JP Enterprises 9mm AR Silent Captured Spring Alternate Operating Springs

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MPN JPSCS-PACK9
Description
The JP EnterprisesA(R) 9mm AR Silent Captured Spring Alternate Operating Springs allow for custom tuning of the device to any given rifle. These springs can yield truly optimized performance and are perfect for rifles without an adjustable gas block. These different springs feature one spare guide rod retainer screw is also included 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-SPRING15-100: Uncolored JPSCS-SPRING10-100: 1 side red and 1 side uncolored JPSCS-SPRING10-110: 1 side yellow and 1 side red