JP Enterprises AR-15 Silent Captured Spring Alternate Operating Springs

Compatible with both first-generation and GEN 2 Silent Captured Spring AR-15 models, the JP Enterprises AR-15 Silent Captured Spring Alternate Operating Springs allows you to fine-tune your firearm for improved performance fit to your liking. All-steel construction maximizes strength and enhances longevity. In selecting a spring for your rifle, install a heavier spring if you feel the buffer head fully compress and bottom out while firing the weapon. If the bolt carrier will not lock back reliably on the last round fired, even when completely gassed (in the case of an adjustable gas block), select a lighter spring. It's that easy! Includes 5 color-coded springs of varying weights. Also includes one spare guide rod retainer screw in case of thread stripping during disassembly. The included springs, from lightest to heaviest, are listed below with the color with which they are coded: JPSCS-SPRING15-80: 1 side white JPSCS-SPRING15-85: 1 side black JPSCS-SPRING15-90: 1 side green JPSCS-SPRING15-95: 1 side yellow JPSCS-SPRING15-100: no color