JP Enterprises Alternate Spring Pack for AR-10, LR-308 Silent Captured Spring Recoil Buffer

Overview

The JP Enterprises Alternate Spring Pack is designed to allow custom tuning of the JP Silent Captured Spring (JPSCS-10) recoil buffer system on large-frame AR-308 and LR-308 rifles. While the default spring is selected for the widest range of configurations, swapping springs enables optimized performance and reliable cycling, particularly in rifles lacking an adjustable gas block. Selecting a heavier spring helps prevent the buffer head from fully bottoming out during firing, while a lighter spring can assist when the bolt carrier fails to lock back reliably on the last round. The kit includes three distinct spring rate combinations: a side-red spring, a side-blue and side-red spring, and a side-yellow and side-red spring, providing the necessary variability to achieve successful cycling across diverse large-frame platforms.

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