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

Gunsmith Tools Rifle Tools Wrenches SHORT ACTION CUSTOMS MODEL 8 WRENCH HEAD - ARC NUCLEUS /ARCHIMEDES Support

The SAC Model 8 Wrench Head fits Nucleus/Archimedes actions, ensuring precise torque and protection, made from durable 4140 Alloy Steel with a black nitride finish.
-10 %

SHORT ACTION CUSTOMS MODEL 8 WRENCH HEAD - ARC NUCLEUS /ARCHIMEDES

100050111
Variations
Filters:
Variations:

Variations:

-10 %
The SAC Model 8 Wrench Head fits Nucleus/Archimedes actions, ensuring precise torque and protection, made from durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 8 WRENCH HEAD - ARC NUCLEUS /ARCHIMEDES
94.9 GBP 2 £94.90 * £104.90
In stock
Make: American Rifle Company Model: Nucleus, Archamedes Product no.: 100050111
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Modular Action Wrench Head Model 10 ensures precise fit and torque for Defiance Elite actions, made from durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 10 WRENCH HEAD - DEFIANCE ELITE
94.9 GBP 2 £94.90 * £104.90
In stock
Product no.: 100050112
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Modular Action Wrench Head for Sako A7 ensures precise fit and torque, protecting your action while offering quick, tool-less versatility for various actions.
MODULAR ACTION WRENCH HEADS - MODEL 11 WRENCH HEAD - DEFIANCE .750 DIA BOLTS, SURGEON XL
94.9 GBP 2 £94.90 * £104.90
In stock
Make: Sako Model: A7 Product no.: 100050113
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Model 3 Wrench Head fits American Rifle Company Mausingfield actions, ensuring precise torque and protection, made from durable 4140 Alloy Steel.
MODULAR ACTION WRENCH HEADS - MODEL 3 WRENCH HEAD - ARC MAUSINGFIELD
94.9 GBP 2 £94.90 * £104.90
In stock
Make: American Rifle Company Model: Mausingfield Product no.: 100050108
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Model 5 Wrench Head for Tikka T3/T3X offers precise fit, durable 4140 Alloy Steel construction, and tool-less operation for efficient gunsmithing.
MODULAR ACTION WRENCH HEADS - MODEL 5 WRENCH HEAD - TIKKA T3, T3X
94.9 GBP 4 £94.90 * £104.90
In stock
Make: Tikka Model: T3 Product no.: 100050109
In stock
94.9 GBP 4 £94.90 * £104.90
The SAC Modular Action Wrench Head for Remington 700 ensures precise fit and torque, protecting your action while offering quick, tool-less adaptability.
MODULAR ACTION WRENCH HEADS - MODEL 1 WRENCH HEAD - REMINGTON 700
104.9 GBP 0 £104.90 *
Backorderable
Make: Remington Model: 700 Product no.: 100050106
Backorderable
104.9 GBP 0 £104.90 *
The SAC Modular Action Wrench Head Model 2 fits Winchester M70 and FN SPR actions, ensuring precise torque and protection with durable 4140 Alloy Steel.
MODULAR ACTION WRENCH HEADS - MODEL 2 WRENCH HEAD - WINCHESTER M70, FN SPR
104.9 GBP 0 £104.90 *
Backorderable
Make: Winchester, Springfield, FN Model: 70, SPR, 1903 Product no.: 100050107
Backorderable
104.9 GBP 0 £104.90 *
The SAC Model 7 Wrench Head offers precise fit, protects your action, and works with Bighorn TL/SR/Origin actions, ensuring efficient, tool-less operation.
MODULAR ACTION WRENCH HEADS - MODEL 7 WRENCH HEAD - ZERMATT TL/SR/ORIGIN
104.9 GBP 0 £104.90 *
Backorderable
Make: Bighorn Model: Origin, SR, TL Product no.: 100050110
Backorderable
104.9 GBP 0 £104.90 *
-10 %
The SAC Model 6 Wrench Head for Howa 1500 ensures precise torque application, protects your action, and is made of durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 6 WRENCH HEAD - HOWA 1500
94.9 GBP 0 £94.90 * £104.90
Not available
Product no.: 430111702
Not available
94.9 GBP 0 £94.90 * £104.90
94.9 104.9 9 GBP
-10 %
MSRP £104.90
94.9 GBP £94.90

Prices inclusive of duty & VAT.

Product no.: 100050111

Mfr. No.: SAC-MAWHM8

MODULAR ACTION WRENCH HEADS **DO NOT use SAC action wrench head without proper SAC bumpers. Bumpers are only available with the Modular Action Wrench Kit** The SAC Modular Action Wrench Heads are designed to precisely fit your action to ensure proper torque and to protect your action from any damage. Made from 4140 Alloy Steel and heat treated to HRC 32 with a black nitride finish. With a low cost, the action wrench heads are quick and tool-less allowing the end user to have one tool that can work on most actions, without compromise. Actions that do not utilize a counterbore on the barrel face will come with a short front bumper to properly locate it in the action. Simply select the appropriate model number for the action you wish to use. If you do not see your action listed, please contact SAC, they are always developing new action wrench heads and some actions may work with certain models. We will update the list. *** Indicates Right Hand Configuration Only Heads Model 1: Remington 700 actions, Defiance Deviant/Ruckus/Rebel actions ( Does not fit Defiance Elite), Impact 737 actions, Bergara B14, Lone Peak Fuzion. Model 2: Winchester M70, FN SPR actions, Springfield 1903 *** Model 3: American Rifle Company Mausingfield actions *** Model 4: BAT Machine TR and similar actions Model 5: Tikka T3 actions Model 6: Howa 1500 actions ***, Borden actions, Kelbly’s actions and Savage® Actions Model 7: Bighorn TL, SR, and Origin actions, ejector must be removed. Gunwerks GLR Left and Right, Savage Small Shank. Model 8: American Rifle Company Nucleus/Archimedes actions Model 9: Curtis Custom actions only, will not work with Terminus actions Model 10: Defiance Elite, Pierce actions, Tuebor Raider Model 11: Defiance .750″ diameter bolts, Surgeon XL Model 12: Sako A7 Model 13: Surgeon 591 Model 14: Terminus actions, will work with Curtis Customs Model 15: Sako TRG actions Model 20: McMillan TAC50 actions
In stock 2 pcs. in the USA warehouse
Be the first to rate this product
1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £104.90
£94.90

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
94.9 104.9 9 GBP
Description Specification Customers reviews Accessories

SHORT ACTION CUSTOMS MODEL 8 WRENCH HEAD - ARC NUCLEUS /ARCHIMEDES

-10 %
MSRP £104.90
94.9 GBP £94.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £104.90
£94.90

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:

Introducing the MODULAR ACTION WRENCH HEADS by SHORT ACTION CUSTOMS

The SAC Modular Action Wrench Heads are expertly crafted to ensure a perfect fit for your action, providing the necessary torque while safeguarding it from potential damage.

Important Note:

DO NOT use the SAC action wrench head without the appropriate SAC bumpers. Bumpers are exclusively available with the Modular Action Wrench Kit.

Product Features:

  • Manufactured from 4140 Alloy Steel
  • Heat treated to HRC 32
  • Black nitride finish for durability
  • Cost-effective and tool-less design for convenience
  • Compatible with most actions without compromise

For actions that do not feature a counterbore on the barrel face, a short front bumper is included to ensure proper alignment within the action. Simply select the model number that corresponds to your action. If your action is not listed, please reach out to SAC as they are continually developing new action wrench heads and some actions may be compatible with specific models. The list will be updated accordingly.

Available Models:

  • Model 1: Remington 700 actions, Defiance Deviant/Ruckus/Rebel actions (Does not fit Defiance Elite), Impact 737 actions, Bergara B14, Lone Peak Fuzion.
  • Model 2: Winchester M70, FN SPR actions, Springfield 1903.
  • Model 3: American Rifle Company Mausingfield actions.
  • Model 4: BAT Machine TR and similar actions.
  • Model 5: Tikka T3 actions.
  • Model 6: Howa 1500 actions, Borden actions, Kelbly’s actions, and Savage® Actions.
  • Model 7: Bighorn TL, SR, and Origin actions (ejector must be removed), Gunwerks GLR Left and Right, Savage Small Shank.
  • Model 8: American Rifle Company Nucleus/Archimedes actions.
  • Model 9: Curtis Custom actions only (will not work with Terminus actions).
  • Model 10: Defiance Elite, Pierce actions, Tuebor Raider.
  • Model 11: Defiance .750″ diameter bolts, Surgeon XL.
  • Model 12: Sako A7.
  • Model 13: Surgeon 591.
  • Model 14: Terminus actions (will work with Curtis Customs).
  • Model 15: Sako TRG actions.
  • Model 20: McMillan TAC50 actions.

For any inquiries or further assistance, please do not hesitate to contact us.



Top takeaways

  1. The SAC Model 8 Wrench Head is specifically designed for American Rifle Company Nucleus/Archimedes actions and is made from heat-treated 4140 Alloy Steel with a black nitride finish.
  2. It is crucial not to use the SAC action wrench head without the proper SAC bumpers, which are included in the Modular Action Wrench Kit.
  3. For actions not listed, customers should contact SAC as they continuously develop new models and some actions may be compatible with existing wrench heads.

Attributes

  • Model: 
    Nucleus
    , 
    Archamedes
  • Weapon type: 
    American Rifle Company
  • 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:

-10 %
The SAC Model 8 Wrench Head fits Nucleus/Archimedes actions, ensuring precise torque and protection, made from durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 8 WRENCH HEAD - ARC NUCLEUS /ARCHIMEDES
94.9 GBP 2 £94.90 * £104.90
In stock
Make: American Rifle Company Model: Nucleus, Archamedes Product no.: 100050111
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Modular Action Wrench Head Model 10 ensures precise fit and torque for Defiance Elite actions, made from durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 10 WRENCH HEAD - DEFIANCE ELITE
94.9 GBP 2 £94.90 * £104.90
In stock
Product no.: 100050112
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Modular Action Wrench Head for Sako A7 ensures precise fit and torque, protecting your action while offering quick, tool-less versatility for various actions.
MODULAR ACTION WRENCH HEADS - MODEL 11 WRENCH HEAD - DEFIANCE .750 DIA BOLTS, SURGEON XL
94.9 GBP 2 £94.90 * £104.90
In stock
Make: Sako Model: A7 Product no.: 100050113
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Model 3 Wrench Head fits American Rifle Company Mausingfield actions, ensuring precise torque and protection, made from durable 4140 Alloy Steel.
MODULAR ACTION WRENCH HEADS - MODEL 3 WRENCH HEAD - ARC MAUSINGFIELD
94.9 GBP 2 £94.90 * £104.90
In stock
Make: American Rifle Company Model: Mausingfield Product no.: 100050108
In stock
94.9 GBP 2 £94.90 * £104.90
-10 %
The SAC Model 5 Wrench Head for Tikka T3/T3X offers precise fit, durable 4140 Alloy Steel construction, and tool-less operation for efficient gunsmithing.
MODULAR ACTION WRENCH HEADS - MODEL 5 WRENCH HEAD - TIKKA T3, T3X
94.9 GBP 4 £94.90 * £104.90
In stock
Make: Tikka Model: T3 Product no.: 100050109
In stock
94.9 GBP 4 £94.90 * £104.90
The SAC Modular Action Wrench Head for Remington 700 ensures precise fit and torque, protecting your action while offering quick, tool-less adaptability.
MODULAR ACTION WRENCH HEADS - MODEL 1 WRENCH HEAD - REMINGTON 700
104.9 GBP 0 £104.90 *
Backorderable
Make: Remington Model: 700 Product no.: 100050106
Backorderable
104.9 GBP 0 £104.90 *
The SAC Modular Action Wrench Head Model 2 fits Winchester M70 and FN SPR actions, ensuring precise torque and protection with durable 4140 Alloy Steel.
MODULAR ACTION WRENCH HEADS - MODEL 2 WRENCH HEAD - WINCHESTER M70, FN SPR
104.9 GBP 0 £104.90 *
Backorderable
Make: Winchester, Springfield, FN Model: 70, SPR, 1903 Product no.: 100050107
Backorderable
104.9 GBP 0 £104.90 *
The SAC Model 7 Wrench Head offers precise fit, protects your action, and works with Bighorn TL/SR/Origin actions, ensuring efficient, tool-less operation.
MODULAR ACTION WRENCH HEADS - MODEL 7 WRENCH HEAD - ZERMATT TL/SR/ORIGIN
104.9 GBP 0 £104.90 *
Backorderable
Make: Bighorn Model: Origin, SR, TL Product no.: 100050110
Backorderable
104.9 GBP 0 £104.90 *
-10 %
The SAC Model 6 Wrench Head for Howa 1500 ensures precise torque application, protects your action, and is made of durable 4140 Alloy Steel with a black nitride finish.
MODULAR ACTION WRENCH HEADS - MODEL 6 WRENCH HEAD - HOWA 1500
94.9 GBP 0 £94.90 * £104.90
Not available
Product no.: 430111702
Not available
94.9 GBP 0 £94.90 * £104.90

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