Sprinco Extractor Upgrade KIT - Includes Extra Power 5-Coil Extractor Springs, Mil-Spec Black Extractor Insert, Mil-Spec Viton O-Ring

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
• Enhanced 4-Coil springs maintain an extended duty cycle oad of a NEW Mil-Spec spring and is recommended for use in 18"+BBL lengths for those who retieve 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
• 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 withour CRANE O-rings. May be required for use in DPMS G2 Bolts for full-auto use.
• Plug & play - May easily be the only extractor springs needed for the life of your bolt!!