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 offers positive shoulder purchase to prevent 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. Made in U.S.A. Features Mounts to Rifle Receiver Extension tube without A2 Spacer (not included) Enhanced strength butt-plate withstands severe impact and recoil up to .50 BMG Machined aluminum adjustment knobs with positive locking click detents Black phosphate coated solid steel adjustment shafts Bottom Picatinny-type rail with removable cover for use with monopod Sling Mounts Front/Rear - 1.25" sling loop (left-right reversible) Optional Accessories* PRS Extended Rubber Butt-Pad, 0.80" Specifications** PRS AR15/M16 Stock Weight, Stock: 1.68 lb. Weight, w/ Rifle Receiver Extension: 1.90 lb. Length, Stock: 10.45-11.45 in. LOP Adjustment: ~39 Clicks (0.026 in. / click) LOP Adjustment Range: 1.00 in. LOP, Min: 13.3 in. LOP, Max: 14.3 in. Cheek Height Adjustment: ~29 Clicks (0.026 in. / click) Cheek Height Adjustment Range: 0.75 in. NOTE: The PRS is a direct replacement for an A1 or A2 fixed stock. Fitting to a Carbine will require a Rifle Receiver Extension tube, Rifle Buffer and Spring (not included). DO NOT USE THE PRS AR15/M16 ON AR10-TYPE RIFLES DUE TO CHARGING HANDLE CLEARANCE ISSUES! Please order the the AR10/SR25 PRS: PRS Precision-Adjustable Butt Stock – AR10/SR25. Contact Magpul at 1.877.4MAGPUL if you need to convert your current PRS stock to the AR10/SR25 model. * Optional PRS Extended Rubber Butt-Pad, 0.80" adds 0.50 in. LOP and 0.07 lb. vs. standard pad. Butt-pads are only for use with PRS AR15/M16 and PRS AR10/SR25 models. ** Specifications based on factory configuration. PRS® Precision-Adjustable Butt Stock Technical Resources: PRS Stock Tech Note- Installation & Usage WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Magpul Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product. EXPORT NOTICE: This product and/or its components is subject to the International Traffic in Arms Regulations (ITAR, 22 CFR Parts 120-130) and export is strictly prohibited without authorization or a license issued by the U.S. Department of State's Directorate of Defense Trade Controls. Additionally, any documents or engineering drawings, prints, etc. that can be viewed, downloaded, or printed from our Web site may contain technical data which may not be exported outside of the United States, or released or disclosed to non-US persons (i.e. persons who are not US citizens or lawful permanent residents) inside of the United States, without prior written authorization by the relevant US Government agency. Violations of these export laws are subject to severe civil, criminal and administrative penalties.