Sprinco USA AR .308 Dual Extractor CS Spring Upgrade Kit

Sprinco’s Extractor Springs are made of chrome silicon wirestock that has been heat treated, stress relieved, and cryogenic processing post winding. The springs are also plated with re-micronized molybdenum disulfide formulation.

Advantages

• XP 5-Coil spring has a heavier spring load than OEM springs, thus negating the need for a D-Fender™ ring or adding CRANE Viton O-Rings
• Use the 5-Coil spring with either black extractor spring insert or CRANE Viton O-Rings, but not both
• Enhanced 4-Coil springs maintain an extended duty cycle load of a NEW Mil-Spec spring and is recommended for use in 18"+ barrel lengths for those who retrieve their brass for reloading
• Extreme duty cycles provided while maintaining performance specifications
• Unaffected by heat up to 750°F
• D-Fender™ rings are NOT recommended for use with our 5-Coil extractor springs
• Dual spring XP .308 extractor spring sets may be used with or without CRANE O-rings
• Plug & play — may easily be the only extractor springs needed for the life of your bolt