CONSTRUCTION SPECS EXTRACTOR SPRINGS:
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Chrome Silicon Wirestock
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Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding
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Impregnation / Plating with Re-Micronized Molybdenum Disulfide Formulation
ADVANTAGES:
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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
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Use 5-Coil spring with either black extractor spring insert OR CRANE Viton O-Rings, but not both
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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 retieve their brass for reloading
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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
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Extreme duty cycles provided while maintaining performance specifications
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Unaffected by heat up to 750°F
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D-Fender™ rings are NOT recommended for use with Springco 5-Coil extractor springs.
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Plug & play – May easily be the only extractor springs needed for the life of your bolt!!
