"The Magpul PRS GEN3 Precision Rifle/Sniper Stock mounts to rifle-length receiver extension tubes (AR10/SR25 platform) without A2 spacers, as well as some mil-spec M4 carbine extension tubes with standard castle nuts and end plates (not included). The PRS GEN3 (Precision Rifle/Sniper) stock offers length-of-pull and comb height adjustments with positive locking aluminum click detent knobs. The steel adjustment shafts are finished with a durable Melonite finish for wear and corrosion resistance, while all aluminum components are finished with a MIL-A-8625F, Type III, Class 2 hard anodized coating. A rubber butt-pad offers an anti-slip surface for the shoulder, and is adjustable for cant and height. Multiple sling attachment points include 2 rotation-limited QD sling swivel cups, a right/left reversible 1.25"" aluminum sling loop, and M-LOK slots on the bottom of the stock provide attachment points for Picatinny rail sections. Manufacturer model #: MAG672. Compatible with rifle-length receiver extension tubes Length-of-pull and cheek-piece height adjustments Positive locking aluminum click detent knobs Reversible 1.25"" aluminum sling loop Rotation-limited QD sling mounts Hard rubber butt-pad M-LOK slots"