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

Rifle Parts Receiver Parts Recoil Parts Recoil Springs SPRINCO USA SPRING KIT-STD BUFFER & HD 5-COIL BOLT EXTRACTOR SPRING Support

The SPRINCO USA M4 Carbine Standard Spring Kit offers reliable performance, equivalent to a new Mil-Spec spring, ensuring durability without frequent replacements.
-10 %

SPRINCO USA SPRING KIT-STD BUFFER & HD 5-COIL BOLT EXTRACTOR SPRING

657780250097 943000039
Variations
Filters:
Variations:

Variations:

-10 %
The SPRINCO USA M4 Carbine Standard Spring Kit offers reliable performance, equivalent to a new Mil-Spec spring, ensuring durability without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - SPRING KIT-STD BUFFER & HD 5-COIL BOLT EXTRACTOR SPRING
36.9 GBP 6 £36.90 * £40.90
In stock
Product no.: 943000039
In stock
36.9 GBP 6 £36.90 * £40.90
-10 %
The SPRINCO USA M4 Carbine Standard Spring Kit offers reliable performance equivalent to a new Mil-Spec spring, ensuring consistent operation without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - SPRING KIT-STD BUFFER & 4-COIL BOLT EXTRACTOR SPRING
36.9 GBP 3 £36.90 * £40.90
In stock
Product no.: 943000040
In stock
36.9 GBP 3 £36.90 * £40.90
The SPRINCO USA M4 Carbine Buffer Spring delivers reliable performance equivalent to a new Mil-Spec spring, ensuring consistent function without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - M4 CARBINE BUFFER SPRING
37.9 GBP 0 £37.90 *
Backorderable
Product no.: 943000041
Backorderable
37.9 GBP 0 £37.90 *
36.9 37.9 3 GBP
-10 %
MSRP £40.90
36.9 GBP £36.90

Prices inclusive of duty & VAT.

Product no.: 943000039

Mfr. No.: 25009

657780250097 Standard Power Buffer Spring. Equivalent spring load to a brand new Mil-Spec M4 Carbine Spring. This spring will perform reliably in any properly configured and maintained 5.56 Carbine, if you wish to maintain the performance of a "fresh" Mil-Spec load spring without concern for replacement. This is the best choice for shooters and purists that wish to maintain the performance of most factory supplied new Mil-Spec springs, but do not wish to be concerned with frequent replacement of same or do not have the time or inclination to seek enhanced performance options. Just consider it as permanent new Mil-Spec spring.
In stock 6 pcs. in the USA warehouse
Be the first to rate this product
1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £40.90
£36.90

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
36.9 37.9 3 GBP
Description Specification Customers reviews Accessories

SPRINCO USA SPRING KIT-STD BUFFER & HD 5-COIL BOLT EXTRACTOR SPRING

-10 %
MSRP £40.90
36.9 GBP £36.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £40.90
£36.90

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:

Enhance your shooting experience with reliability and performance.

The M4 CARBINE CS STANDARD SPRING KITS from SPRINCO USA are designed to deliver consistent performance for your 5.56 Carbine. These kits include a Standard Power Buffer Spring that matches the spring load of a brand new Mil-Spec M4 Carbine Spring.

Key Features:

  • Reliable Performance: This spring ensures dependable operation in any properly configured and maintained 5.56 Carbine.
  • Long-lasting Solution: Maintain the performance of a "fresh" Mil-Spec load spring without the worry of frequent replacements.
  • Ideal for Shooters and Purists: Perfect for those who prefer to keep their firearm’s performance consistent with factory-supplied Mil-Spec springs.
  • Convenience: A great choice for those who lack the time or inclination to seek enhanced performance options.

Consider the M4 Carbine Standard Spring Kit as a permanent replacement for your Mil-Spec spring, ensuring your firearm remains in top condition for all your shooting needs.



Top takeaways

  1. The spring is designed to match the performance of a new Mil-Spec M4 Carbine Spring for reliable operation in any 5.56 Carbine.
  2. It is ideal for those who want to maintain "fresh" Mil-Spec spring performance without frequent replacements.
  3. SPRINCO USA's spring is a suitable option for shooters who prefer not to upgrade but desire consistent, long-term reliability.

Attributes

  • Delivery weight: 0.073kg
  • Shipping height: 25mm
  • Shipping width: 25mm
  • Shipping length: 337mm
  • UPC: 657780250097

Item details

Made in USA

Customers reviews

Customer ratings (0)

0 / 5

Variations:

-10 %
The SPRINCO USA M4 Carbine Standard Spring Kit offers reliable performance, equivalent to a new Mil-Spec spring, ensuring durability without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - SPRING KIT-STD BUFFER & HD 5-COIL BOLT EXTRACTOR SPRING
36.9 GBP 6 £36.90 * £40.90
In stock
Product no.: 943000039
In stock
36.9 GBP 6 £36.90 * £40.90
-10 %
The SPRINCO USA M4 Carbine Standard Spring Kit offers reliable performance equivalent to a new Mil-Spec spring, ensuring consistent operation without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - SPRING KIT-STD BUFFER & 4-COIL BOLT EXTRACTOR SPRING
36.9 GBP 3 £36.90 * £40.90
In stock
Product no.: 943000040
In stock
36.9 GBP 3 £36.90 * £40.90
The SPRINCO USA M4 Carbine Buffer Spring delivers reliable performance equivalent to a new Mil-Spec spring, ensuring consistent function without frequent replacements.
M4 CARBINE CS STANDARD SPRING KITS - M4 CARBINE BUFFER SPRING
37.9 GBP 0 £37.90 *
Backorderable
Product no.: 943000041
Backorderable
37.9 GBP 0 £37.90 *

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