SPRINCO USA Spring Kit-XP Buffer Spring & Enhanced 4Coil Bolt Extractor Spring

SPRINCO USA Spring Kit – XP Buffer Spring & Enhanced 4Coil Bolt Extractor Spring

Enhance your AR’s reliability with the SPRINCO USA Spring Kit, featuring:

• Extra Power Buffer Spring (Red)
• Enhanced 4Coil Bolt Extractor Spring

Originally designed in 2006 for a Force Modernization Team, this kit addresses M4 carbine reliability issues in challenging environments. The Red spring offers approximately 25% greater design loads compared to the White spring, making it ideal for:

• 9mm, 6.8 SPC, 6.5 Grendel
• .450 BM, .450 SOCOM, .500 Beowulf
• Colt LE6920 specimen carbines

Note: Performance may vary depending on port values and ammunition loads. Consult tuning procedure documents before use.