The Magpul PRS (Precision Rifle/Sniper) – AR10/SR25 Model is a drop-in, precision-adjustable butt stock especially designed for the longer charging handle throw of 7.62 NATO platforms. Designed to offer the fine-tuned, customized feel of a precision target stock, the PRS is adjustable for both comb height and length-of-pull without sacrificing the durability necessary to withstand the operational environment.