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 plated with a re-micronized molybdenum disulfide formulation.

Advantages

• XP 5-Coil spring has a heavier spring load than OEM springs, negating the need for a D-Fender™ ring or adding CRANE Viton O-Rings.
• Use the 5-Coil spring with either the 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; recommended for 18"+ barrel lengths for those who retrieve brass for reloading.
• While the XP 5-Coil spring is reliable for all 5.56 barrel lengths, it can be aggressive on case rims in 18"+ length rifles and may be too strong for some bolts with extremely tight bolt face tolerances.
• Extreme duty cycles while maintaining performance specifications.
• Unaffected by heat up to 750°F.
• D-Fender™ rings are NOT recommended for use with Sprinco 5-Coil extractor springs.
• Dual spring XP .308 extractor spring sets may be used with or without CRANE O-rings.
• May be required for use in DPMS G2 Bolts for full-auto use.
• Plug & play; may be the only extractor springs needed for the life of your bolt.