JP Enterprises AR Silent Captured Spring Extra Short Alternate Operating Springs

JP Enterprises AR Silent Captured Spring Extra Short Alternate Operating Springs This kit for the JPSCS2 extra short models includes two lighter weight springs in addition to a spare of the standard weight. These lighter springs are useful if your bolt carrier will not lock back reliably on the last round fired, even when completely gassed (in the case of an adjustable gas block). The included springs from lightest to heaviest are listed below with the color with which they are coded: XS-85: 1 side blue and 1 side black XS-95: 1 side green and 1 side black XS-100: Uncolored One spare guide rod retainer screw is also included in case of thread stripping during disassembly.