The Sprinco Usa M16/M4 Extractor Spring Upgrade Kits - Upgrade Kit- Xp 5-COIL Extractor Spring, Insert, O-ring is a replacement part.
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.
Enhanced 4-Coil springs maintain an extended duty cycle load of a NEW Mil-Spec spring and is recommended for use in 18""+BBL lengths for those who retrieve their brass for reloading
While the XP 5-Coil spring is totally reliable for all 5.56 BBL lengths, it can be aggressive on case rims in 18""+length BBL rifles, and may be too strong for some bolts with extremely tight bolt face tolerances
Features
- 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 5-Coil spring with either black extractor spring insert OR CRANE Viton O-Rings, but not both
- Extreme duty cycles provided while maintaining performance specifications
- Unaffected by heat up to 750°F
Specifications
- Brand: Sprinco Usa
- UPC: 657780262014
