Flat wire magazine springs support indefinite storage at full capacity without spring fatigue and are designed to prevent over-compression with anti-tilt followers.
These springs ensure a uniform feed rate and improved support for the top 4 rounds, while being easier to load compared to round wire springs.
Compatible with most magazine bodies and anti-tilt followers including USGI, Magpul, Lancer, and Hexmag, with exceptions like Brownells USGI Tan followers and some ETS and HK mags.
Sprinco USA produces Mil-Spec extractor inserts and O-rings, exceeding standard requirements, using their own high-quality molds and materials.
All Sprinco products are made in the USA, ensuring superior grade base materials over commercial or foreign imports.
The Black Extractor Spring Inserts and Viton CRANE O-Rings meet specific military specifications (MIL-PRF-6855-REV G and MIL-R-83248C).
The Orange buffer spring is designed for heavy BCG carbine applications in .308/6.5 CM/.260 Rem calibers using standard 7" M4 extension tubes.
It is suitable for tuning over-gassed carbines in AR-10 pattern tubes with 3.25" buffers or for lesser calibers like 5.56.
This SPRINCO USA spring kit includes an extra power buffer spring and dual extractor springs for enhanced performance.
Sprinco USA's Extractor Springs are heat treated, stress relieved, and cryogenically processed for durability, with a molybdenum disulfide coating for performance.
The 5-Coil spring is ideal for all 5.56 barrel lengths but may be too strong for 18"+ barrels or bolts with very tight tolerances, while the 4-Coil is recommended for longer barrels and brass reloading.
These extractor springs can withstand temperatures up to 750°F and are designed to be the only springs needed for the life of your bolt, with no need for D-Fender™ rings when using the 5-Coil version.
The SPRINCO USA spring kit includes a standard power buffer spring with an equivalent load to a new Mil-Spec M4 Carbine Spring.
Designed for reliable performance in any properly maintained 5.56 Carbine, it is ideal for those who want the consistency of a new spring without frequent replacements.
This spring is optimal for shooters who prefer to maintain factory new Mil-Spec spring performance without seeking enhanced performance options.
The Orange extra extra power buffer spring is designed for heavy calibers like .308 / 6.5 CM / .260 Rem in carbine DPMS Pattern applications.
It is suitable for use with standard 7" depth M4 extension tubes and short 2.5" buffers, including aftermarket "heavy buffers".
The spring is also beneficial for tuning over-gassed carbines of any equivalent heavy calibers in AR-10 pattern tubes with 3.25" buffers or for lesser calibers such as 5.56.
The Yellow spring is approximately 20% lighter than the White spring, designed in collaboration with ammunition manufacturers and gunsmiths.
For guns requiring a lighter spring, it's recommended to enlarge the gas port for better reliability.
The Yellow spring is suitable for low power SRTA and SIMS Rounds in training operations.
Sprinco's Ejector Springs are made from heat-treated, stress-relieved chrome silicon wirestock with added cryogenic processing for durability.
The springs are coated with a re-micronized molybdenum disulfide formulation for enhanced performance.
These ejector springs are designed to withstand temperatures up to 750ºF and maintain performance over an extreme length duty cycle.
The Green spring is suitable for A1/A2 fixed stock rifles with rifle length buffers and is optimized for lesser calibers like .223, 5.56, and others.
It can also be used in VLTOR A5 buffer tubes and may be appropriate for heavier calibers with long barrels when combined with H2 or H3 carbine buffers.
For over gassed heavier caliber guns with rifle length tubes, SPRINCO USA recommends their Red or Orange carbine springs with a standard carbine buffer and spacer.
The Blue spring has approximately 15% greater load than the White spring, tailored for high-performance demands.
Mike Pannone of CTT Solutions influenced the production of the Blue spring, which is suitable for a range of specimen platforms.
While often paired with an H2 or ST-T2 buffer for 14.5 - 16” ML carbines, the optimal setup can vary due to diverse gas port values.
The Hot White spring was an accidental production between White and Blue spring loads but became a valuable tuning solution.
Customers seeking an intermediate spring performance found the Hot White spring to perfectly meet their needs.
It's a good choice for those preferring Mil-Spec carbine springs, enhancing performance in most situations.
The Orange buffer spring is designed for heavy caliber applications such as .308, 6.5 CM, and .260 Rem in AR-10 pattern rifles with standard 7" M4 extension tubes.
It is suitable for carbine platforms with a robust gas system, particularly in 16” - 18” ML gas carbine platforms with heavy BCGs.
This spring is also effective for tuning over-gassed carbines and can be used in AR-10 tubes with 3.25" buffers or with lesser calibers like 5.56.
Sprinco's Ejector Springs are crafted from heat-treated, stress-relieved chrome silicon wirestock with additional cryogenic processing for durability.
The springs are coated with a re-micronized molybdenum disulfide formulation for enhanced performance.
These ejector springs are designed to withstand temperatures up to 750ºF and maintain performance over an extreme length duty cycle.
The AR .308 Pattern Carbine CS Spring Kit by Sprinco USA is designed to address M4 carbine reliability issues, especially for operations in Eastern Asia.
The Red spring in the kit has approximately 25% greater load capacity than the White spring, enhancing performance for various calibers.
Users should refer to tuning procedure reference documents before seeking recommendations for the spring's use with specific firearms and ammunition loads.
Sprinco’s Extractor Springs are made from heat-treated chrome silicon, cryogenically processed, and molybdenum disulfide plated for durability and performance.
The XP 5-Coil spring provides a heavier load than OEM springs, eliminating the need for additional D-Fender™ rings or CRANE Viton O-Rings.
Enhanced 4-Coil springs are recommended for 18" or longer barrels for those who reload, while the 5-Coil spring is reliable for all 5.56 barrel lengths but may be too strong for certain bolts.
The Sprinco USA Extra Power Buffer Spring is designed to address M4 carbine reliability issues, specifically for challenges faced in the Eastern Asia Theatre.
The Red spring has design loads approximately 25% greater than the White spring, enhancing performance for various calibers including 9mm, 6.8 SPC, and .500 Beowulf.
Before using, refer to the tuning procedure reference documents, as the optimal spring choice may vary based on individual weapon characteristics and ammunition loads.
SPRINCO USA's AR .308 Dual Extractor CS Spring Upgrade Kits feature heat-treated, stress-relieved, and cryogenically processed chrome silicon wirestock springs with molybdenum disulfide plating.
The XP 5-Coil spring offers a heavier load than OEM springs, eliminating the need for D-Fender™ rings or CRANE Viton O-Rings, and is suitable for all 5.56 BBL lengths.
These springs maintain performance under extreme duty cycles and temperatures up to 750°F, and the dual spring XP .308 sets can be used with or without CRANE O-rings.