UTG Pro RBUS1BM Mil-Spec OPS Ready S1 Stock Kit AR-15/M16 Black Polymer w/Aluminum Tube

The UTG Pro RBUS1BM Mil-Spec OPS Ready S1 Stock Kit is a complete collapsible buttstock assembly purpose-built for the AR-15/M16 platform. Engineered for heavy-duty operations with the tightest tolerance controls, this stock kit delivers a secure fit and consistent function on any mil-spec carbine receiver extension.

The buttstock body is molded from impact-resistant high-strength polymer in black, paired with a mil-spec diameter extension tube precision machined from aircraft-grade aluminum with rolled threads and a hard anodized finish for excellent corrosion and wear resistance. The 6-position tube provides generous length-of-pull adjustment, and the kit ships complete with the buffer, buffer spring, tear-drop ring, and castle nut for straightforward installation.

An ergonomically chamfered rubberized butt pad cushions recoil, while a slanted cheek rest enhances shooting stability and promotes consistent firearm control. A dual storage compartment with removable waterproof caps provides dry storage for batteries (up to 8 CR123 cells) or other small accessories. An integral ambidextrous sling loop and QD mounting point give you flexible sling attachment options.

Snag-free performance comes from fully dehorned corners and melted contours for increased comfort during extended shooting sessions. Proudly made in the USA.