My Account (Sign in)
Your basket is empty.
0
Basket
contact us by phone Help and contact
Free standard delivery over £199
100-day return policy
My Account (Sign in)
Wish list
Your basket is empty. (0)
Basket
Newsletter Newsletter
Sale

Over 300,000 customers - we say thank you!

4.93/5 "Very good" (1400+ reviews)

40,000+ products for hunting and shooting sports

Reloading Measuring Tools Case Gauges & Headspace Tools SHORT ACTION CUSTOMS 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT Support

Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for unmatched quality!
-9 %

SHORT ACTION CUSTOMS 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT

100050153
Variations
Filters:
Variations:

Variations:

-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for unmatched quality!
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 7 mm Product no.: 100050153
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 28° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050131
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050130
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts, designed for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 25 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 25 Caliber (.251) Product no.: 100050133
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts from Short Action Customs.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 1 £46.90 * £49.90
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050157
In stock
46.9 GBP 1 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with our durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050155
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve unmatched accuracy in cartridge headspace and bullet measurements with precision-machined 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 204 RUGER MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 204 Ruger Product no.: 100050132
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30-06 SPRINGFIELD MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 30-06 Springfield Product no.: 100050163
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 WINCHESTER MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 3 £39.90 * £43.90
In stock
Cartridge: 300 Winchester Magnum Product no.: 100050162
In stock
39.9 GBP 3 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 375 CHEYTAC MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 2 £39.90 * £43.90
In stock
Cartridge: 375 Cheytac Product no.: 100050170
In stock
39.9 GBP 2 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050143
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for unmatched accuracy!
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 1 £46.90 * £49.90
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050142
In stock
46.9 GBP 1 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5X55 SWED MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 6.5 x 55 mm Swedish Mauser Product no.: 100050147
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with these 17-4 Stainless Steel Modular Headspace Comparator Inserts, designed for durability and accuracy.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 3 £46.90 * £49.90
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050136
In stock
46.9 GBP 3 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM REMINGTON MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 2 £39.90 * £43.90
In stock
Cartridge: 7 mm Remington Magnum Product no.: 100050151
In stock
39.9 GBP 2 £39.90 * £43.90
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 BLACKOUT MODULAR HEADSPACE COMPARATOR INSERT
49.9 GBP 0 £49.90 *
Backorderable
Cartridge: 300 AAC Blackout Product no.: 100050159
Backorderable
49.9 GBP 0 £49.90 *
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
43.9 GBP 0 £43.90 *
Backorderable
Cartridge: 243/6 mm (.243) Product no.: 100050137
Backorderable
43.9 GBP 0 £43.90 *
Achieve precise cartridge headspace and bullet measurements with 17-4 Stainless Steel inserts for the Modular Headspace Comparator, designed for durability.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 22 Caliber (.223-.224) Product no.: 100050171
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for longevity.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 22 Caliber (.223-.224) Product no.: 100050135
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 223 REMINGTON MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 223 Remington Product no.: 100050134
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for 270 Winchester.
MODULAR HEADSPACE COMPARATOR INSERTS - 270 WINCHESTER MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 270 Winchester Product no.: 100050146
Not available
39.9 GBP 0 £39.90 *
Achieve precise cartridge headspace and bullet measurements with our Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 30 Caliber (.308) Product no.: 100050156
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 30 Caliber (.308) Product no.: 100050160
Achieve precise cartridge headspace and bullet measurements with SAC's 338 Caliber Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050161
Achieve precise cartridge headspace and bullet measurements with SAC's 338 Caliber Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050166
Upgrade your precision with SAC's Modular Headspace Comparator Inserts, crafted from 17-4 Stainless Steel for durability and designed for accurate measurements up to 338 Lapua.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050165
Achieve precise cartridge headspace and bullet measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for longevity.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050173
Achieve precise cartridge headspace and bullet measurements with SAC's modular inserts, crafted from durable 17-4 Stainless Steel for unmatched quality.
MODULAR HEADSPACE COMPARATOR INSERTS - 416 BARRETT MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 416 Barrett Product no.: 100050172
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with precision-machined 17-4 Stainless Steel inserts for your Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 NORMA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 300 Norma Product no.: 100050158
Achieve precise cartridge headspace and bullet measurements with the durable, corrosion-resistant 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 33 XC MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 33 XC Product no.: 100050168
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 LAPUA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Lapua Product no.: 100050164
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 NORMA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Norma Mag Product no.: 100050169
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 37 XC MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 37 XC Product no.: 100050167
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 264/6.5 mm (.264) Product no.: 100050141
Achieve precise cartridge headspace and bullet measurements with the durable, corrosion-resistant 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 264/6.5 mm (.264) Product no.: 100050148
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with these precision-machined 17-4 Stainless Steel inserts for your Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MMX35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050140
Achieve precise cartridge headspace and bullet measurements with SAC's durable, corrosion-resistant 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 40° W/.273" NECK MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050139
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with various calibres.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 40° W/.275" NECK MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050138
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 7 STW MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm STW Product no.: 100050152
Achieve precise cartridge headspace and bullet measurements with our durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050150
Achieve precise cartridge headspace measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for unmatched accuracy.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050149
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 35 ° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050154
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 40° X 125° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050145
39.9 49.9 43 GBP
-9 %
MSRP £43.90
39.9 GBP £39.90

Prices inclusive of duty & VAT.

Product no.: 100050153

Mfr. No.: SAC-740HSC

Headspace Inserts for your Modular Headspace Comparator ***Requires Modular Headspace Comparator Body*** The Modular Headspace Body must be purchased separately and can be found at the Modular Headspace Comparator Body page. New Modular Design for the most accurate cartridge headspace and bullet measurements available! Newly designed Modular Headspace Comparator (MHC) is an updated version of the highly successful dedicated Headspace Comparator that SAC previously made out of 6061 aluminum. They improved on its design allowing the new MHC to be used with cartridges up to 338 Lapua Magnum and more. Each bullet and headspace insert is precision machined out of 17-4 Stainless Steel for increased durability and corrosion resistance. Simply put, these are the highest quality headspace and bullet measuring tools available.
In stock 1 pcs. in the USA warehouse
Be the first to rate this product
1
2
3
4
5
6
7
8
9
10+
-9 %
MSRP £43.90
£39.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

Delivery time approx. 7-14 days.

100-Day Return Policy
No charges until we ship
No charge:
Your credit card will not be charged when you place your order.

No commitments:
You are under no obligation until the goods are shipped. You can cancel your order at any time before shipping - free of charge.

Not until shipping:
Your credit card will only be charged once we ship your order. Not before.
Wish List Ask question
39.9 49.9 43 GBP
Description Specification Customers reviews Accessories

SHORT ACTION CUSTOMS 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT

-9 %
MSRP £43.90
39.9 GBP £39.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
-9 %
MSRP £43.90
£39.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

Description:

Elevate your precision with the Modular Headspace Comparator Inserts!

Introducing the MODULAR HEADSPACE COMPARATOR INSERTS, SHORT ACTION CUSTOMS 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT from SHORT ACTION CUSTOMS. These headspace inserts are designed to enhance the performance of your Modular Headspace Comparator, enabling you to achieve superior accuracy in cartridge headspace and bullet measurements.

Key Features:

  • Compatibility: Requires Modular Headspace Comparator Body (sold separately).
  • New Modular Design: Ensures the most accurate measurements available.
  • Enhanced Capability: The updated Modular Headspace Comparator (MHC) accommodates cartridges up to 338 Lapua Magnum and more.
  • Durable Construction: Each insert is precision machined from 17-4 Stainless Steel for exceptional durability and corrosion resistance.

Experience the highest quality headspace and bullet measuring tools available on the market today. Upgrade your shooting accuracy with the Modular Headspace Comparator Inserts from Short Action Customs!



Top takeaways

  1. The insert is designed for use with a Modular Headspace Comparator Body, which is sold separately.
  2. Made from 17-4 Stainless Steel for durability and corrosion resistance, suitable for cartridges up to 338 Lapua Magnum.
  3. This is an updated, more accurate version of SHORT ACTION CUSTOMS, LLC's previous Headspace Comparator, now with a modular design.

Attributes

  • Cartridge: 
    7 mm
  • Delivery weight: 0.032kg
  • Shipping height: 25mm
  • Shipping width: 89mm
  • Shipping length: 102mm

Item details

Made in USA

Customers reviews

Customer ratings (0)

0 / 5

Variations:

-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for unmatched quality!
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 7 mm Product no.: 100050153
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 28° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050131
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050130
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts, designed for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 25 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 25 Caliber (.251) Product no.: 100050133
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts from Short Action Customs.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 1 £46.90 * £49.90
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050157
In stock
46.9 GBP 1 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with our durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050155
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve unmatched accuracy in cartridge headspace and bullet measurements with precision-machined 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 204 RUGER MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 204 Ruger Product no.: 100050132
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30-06 SPRINGFIELD MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 30-06 Springfield Product no.: 100050163
In stock
39.9 GBP 1 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 WINCHESTER MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 3 £39.90 * £43.90
In stock
Cartridge: 300 Winchester Magnum Product no.: 100050162
In stock
39.9 GBP 3 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 375 CHEYTAC MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 2 £39.90 * £43.90
In stock
Cartridge: 375 Cheytac Product no.: 100050170
In stock
39.9 GBP 2 £39.90 * £43.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050143
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for unmatched accuracy!
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 1 £46.90 * £49.90
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050142
In stock
46.9 GBP 1 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5X55 SWED MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 1 £39.90 * £43.90
In stock
Cartridge: 6.5 x 55 mm Swedish Mauser Product no.: 100050147
In stock
39.9 GBP 1 £39.90 * £43.90
-6 %
Achieve precise cartridge headspace and bullet measurements with these 17-4 Stainless Steel Modular Headspace Comparator Inserts, designed for durability and accuracy.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
46.9 GBP 3 £46.90 * £49.90
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050136
In stock
46.9 GBP 3 £46.90 * £49.90
-9 %
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM REMINGTON MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
39.9 GBP 2 £39.90 * £43.90
In stock
Cartridge: 7 mm Remington Magnum Product no.: 100050151
In stock
39.9 GBP 2 £39.90 * £43.90
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 BLACKOUT MODULAR HEADSPACE COMPARATOR INSERT
49.9 GBP 0 £49.90 *
Backorderable
Cartridge: 300 AAC Blackout Product no.: 100050159
Backorderable
49.9 GBP 0 £49.90 *
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
43.9 GBP 0 £43.90 *
Backorderable
Cartridge: 243/6 mm (.243) Product no.: 100050137
Backorderable
43.9 GBP 0 £43.90 *
Achieve precise cartridge headspace and bullet measurements with 17-4 Stainless Steel inserts for the Modular Headspace Comparator, designed for durability.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 22 Caliber (.223-.224) Product no.: 100050171
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for longevity.
MODULAR HEADSPACE COMPARATOR INSERTS - 22 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 22 Caliber (.223-.224) Product no.: 100050135
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 223 REMINGTON MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 223 Remington Product no.: 100050134
Not available
38.9 GBP 0 £38.90 *
Achieve precise cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts for 270 Winchester.
MODULAR HEADSPACE COMPARATOR INSERTS - 270 WINCHESTER MODULAR HEADSPACE COMPARATOR INSERT
Not available
Cartridge: 270 Winchester Product no.: 100050146
Not available
39.9 GBP 0 £39.90 *
Achieve precise cartridge headspace and bullet measurements with our Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 30 Caliber (.308) Product no.: 100050156
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 30 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 30 Caliber (.308) Product no.: 100050160
Achieve precise cartridge headspace and bullet measurements with SAC's 338 Caliber Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050161
Achieve precise cartridge headspace and bullet measurements with SAC's 338 Caliber Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050166
Upgrade your precision with SAC's Modular Headspace Comparator Inserts, crafted from 17-4 Stainless Steel for durability and designed for accurate measurements up to 338 Lapua.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050165
Achieve precise cartridge headspace and bullet measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for longevity.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Caliber Product no.: 100050173
Achieve precise cartridge headspace and bullet measurements with SAC's modular inserts, crafted from durable 17-4 Stainless Steel for unmatched quality.
MODULAR HEADSPACE COMPARATOR INSERTS - 416 BARRETT MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 416 Barrett Product no.: 100050172
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with precision-machined 17-4 Stainless Steel inserts for your Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 300 NORMA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 300 Norma Product no.: 100050158
Achieve precise cartridge headspace and bullet measurements with the durable, corrosion-resistant 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 33 XC MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 33 XC Product no.: 100050168
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 LAPUA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Lapua Product no.: 100050164
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 338 NORMA MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 338 Norma Mag Product no.: 100050169
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 37 XC MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 37 XC Product no.: 100050167
Achieve precise cartridge headspace and bullet measurements with these durable 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 264/6.5 mm (.264) Product no.: 100050141
Achieve precise cartridge headspace and bullet measurements with the durable, corrosion-resistant 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 6.5MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 264/6.5 mm (.264) Product no.: 100050148
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with these precision-machined 17-4 Stainless Steel inserts for your Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MMX35° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050140
Achieve precise cartridge headspace and bullet measurements with SAC's durable, corrosion-resistant 17-4 Stainless Steel inserts for the Modular Headspace Comparator.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 40° W/.273" NECK MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050139
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with various calibres.
MODULAR HEADSPACE COMPARATOR INSERTS - 6MM X 40° W/.275" NECK MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 243/6 mm (.243) Product no.: 100050138
Achieve precise cartridge headspace and bullet measurements with SAC's durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 7 STW MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm STW Product no.: 100050152
Achieve precise cartridge headspace and bullet measurements with our durable 17-4 Stainless Steel Modular Headspace Comparator Inserts, compatible with up to 338 Lapua Magnum.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050150
Achieve precise cartridge headspace measurements with the Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel for unmatched accuracy.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050149
Achieve unparalleled accuracy in cartridge headspace and bullet measurements with the durable 17-4 Stainless Steel Modular Headspace Comparator Inserts.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 35 ° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050154
Achieve precise cartridge headspace and bullet measurements with SAC's Modular Headspace Comparator Inserts, crafted from durable 17-4 Stainless Steel.
MODULAR HEADSPACE COMPARATOR INSERTS - 7MM X 40° X 125° MODULAR HEADSPACE COMPARATOR INSERT
Cartridge: 7 mm Product no.: 100050145

Customers also bought

Oops! Something went wrong.

We encountered an error while loading this content. Please refresh the page to continue. If the issue persists, contact our customer support.

Site Navigation
Product Categories
Ordering
Customer Service

Welcome!

to Brownells UK, your destination for anything gun related. With our roots in a genuine passion for firearms, we bring you an unmatched selection of Gun Parts, Firearm Accessories, Gunsmithing Tools, Scopes & Red Dot Sights and Expert Knowledge.

Whether you're looking to maintain, repair, or upgrade, we've got what you need!

For Shooters, By Shooters
We share your enthusiasm and know exactly what you're looking for because we're part of the community.

Massive Selection
From the essentials to the unique, find everything under one roof.

Our blend of tradition and innovation
Shop with the convenience of modern technology, backed by a legacy of experience.

Browse our collection and discover why we're the trusted name in shooting sports & hunting.

Brownells Norge - Komplett utvalg av ladeutstyr, våpendeler, kuler, hylser, kikkerter, optikk og luftvåpen Brownells Österreich - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Switzerland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Deutschland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells France - Le plus grand fournisseur d'Accessoires pour le tir, Pièces détachées & Outils d'Armurier Brownells Iberica - El mayor proveedor de accesorios para el Tiro, Piezas y herramientas del armero. Brownells Sverige - Världens största leverantör av Vapendelar, Vapensmide Verktyg & Skyttetillbehör Brownells Suomi Brownells Italia - Il negozio del più grande rivenditore di componenti e accessori per armi da tiro, difesa e caccia Brownells Polska - Największy na świecie dostawca części broni, narzędzi rusznikarskich & akcesoriów strzeleckich Brownells Česko - Největší světový dodavatel součástí zbraní, střeleckého příslušenství a zbrojního nářadí
*
Prices inclusive of duty & VAT.

© 2025 Brownells UK
Part of the Brownells Europe Group

Logo Brownells
Classical viewClassical view Mobile viewMobile view
Back to top