The PRS GEN3 is a field precision stock for AR15/M16 and AR10/SR25 platforms, featuring tool-less length of pull and cheek piece height adjustment. Adjustable for length of pull and cheek piece height via aluminum detent knobs, the PRS GEN3 (Precision Rifle/Sniper) stock is intended for semi automatic sniper or varmint type rifles. It installs on rifle-length receiver extensions as well as mil-spec and A5 length carbine receiver extensions and includes a cant/height-adjustable rubber butt-pad and rotation-limiting QD sling cups as well as M-LOK slots on the bottom for rear monopod mounting. Mounts to rifle-length receiver extension tube without A2 spacer, but will accommodate mil- Mfg: Magpul