The Magpul® PRS™ (Precision Rifle/Sniper – AR15/M16 Model) is a drop-in, precision-adjustable butt stock for rifles with A1/A2 fixed stocks. Designed to offer the fine-tuned, customized feel of a precision target stock, the PRS™ is adjustable for both cheek riser height and length-of-pull without sacrificing the durability necessary to withstand the operational environment. Compared to the A2 stock, the PRS™ can shorten the LOP by 0.25” or extend it by 0.75”. Machined aluminum adjustment knobs feature positive-locking click detents to maintain position under recoil and allows easy, tool-less adjustments by simply rotating the knobs. Machined aluminum butt-plate and alloy steel adjustment shaft provide stability and strength to withstand severe impact conditions. Rubber butt-pad prevents slippage for optimal accuracy even with body armor or modular gear. Bottom Picatinny-type rail allows for monopod use, additional sling mounts or storage. Stock includes all mounting hardware for A1 / A2 type rifles with fixed stock.