The Magpul STR Stock takes your AR-15 to the next level with exceptional cheek weld, rock-solid stability and on-board storage for 4 batteries. Made from reinforced polymer, the STR features a shielded operation lever and friction locking system that prevent accidental adjustments and excessive stock movement. The STR incorporates 2 integral sling loops, a reversible push-button QD sling mount, and a replaceable 0.30 inch thick rubber butt-pad that provides positive shoulder purchase to prevent slippage even with body armor or modular gear. Mounts on mil-spec tubes 2 water-resistant battery storage tubes Each tube will store up to (2) CR123A lithium or AA batteries Supplemental friction lock minimizes wobble Premium chrome-silicon lock spring provides positive locking and long service life Sloping cheek weld provides a wide contact surface for user comfort Shielded release latch prevents snagging and accidental operation Replaceable rubber butt-pad offers anti-slip surface and increased impact protection Compatible with receiver-mount sling attachments International Traffic in Arms Regulations-controlled product Made in USA Order today!