SPRINCO AR-15 M4/M16 Verbeterde 4-Coil Extractor Veer

This 4 coil extractor spring is designed for AR-15/M16 bolt carrier groups and provides the same spring pressure as OEM springs for use in 18"+ rifles. ADVANTAGES: Enhanced 4-Coil springs maintain an extended duty cycle oad of a NEW Mil-Spec spring and is recommended for use in 18"+ barrel lenghts upward 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"+ rifles, and may be too strong for some bolts with extremely tight bolt face tolerances. FEATURES / INFORMATION: 4-Coil Design Unaffected by heat up to 750°F Optimal for rifles with 18” barrel lenghts upward Compatible to AR-15/M16 BCG in all AR-15 calibers Use Mil-Spec extractor insert and O-Ring with the 4-Coil Extractor Spring Extreme duty cycles provided while maintaining performance specifications Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding Impregnation / Plating with Re-Micronized Molybdenum Disulfide Formulation Made from Chrome Silicon wire stock Plug & play - May easily be the only extractor springs needed for the life of your bolt!! Compatible accessories see under this article, accessories. _____________________________________________________________________________________________________________________________________________________________________________________________ General Informations The Sprinco AR-15 Extractor Springs are made from high quality Chrome Silicon wire stock that has been heat treated, stress relieved, and cryogenically processed to produce long lasting durability. Standard for US military, recommended by professional gunsmiths.MADE IN THE USA