Tactical Springs (Sprinco) M4/M16 Extractor Upgrade Kit - Triple Pack

CONSTRUCTION SPECS EXTRACTOR SPRINGS:

• Chrome Silicon Wirestock
• Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding
• Impregnation / Plating 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 5-Coil spring with either black extractor spring insert OR CRANE Viton O-Rings, but not both.
• 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.
• 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.
• Plug & play - May easily be the only extractor springs needed for the life of your bolt!!