The UTG PRO Ops Ready S3 Mil-Spec Stock Kit (brand part no. RBUS3BM) is built for heavy-duty use with tight tolerance control for a genuinely secure fit on an AR-15/M16 lower. The stock body is molded from impact-resistant, high-strength black polymer, while the mil-spec diameter extension tube is precision-machined from aircraft-grade aluminum with rolled threads and anodized for corrosion and wear resistance. A rubberized butt pad and slanted cheek rest improve shooting stability and consistent control, and a unique 6.05-inch sub-compact profile keeps the whole package lightweight with full 6-position adjustability. Every corner is dehorned and every contour melted for snag-free handling, and the kit ships complete with the buffer, buffer spring, tear-drop ring, and castle nut needed to finish the install.

Key Specifications

• Built to heavy-duty, tight-tolerance standards for a secure fit.
• Stock body molded from impact-resistant, high-strength polymer in black.
• Extension tube machined from aircraft-grade aluminum with rolled threads and anodizing.
• Features a rubberized butt pad for shooting stability.
• Includes a slanted cheek rest for consistent firearm control.
• Has an integral ambidextrous QD sling loop.
• Runs a compact 6.05-inch sub-compact profile.
• Adjustable across 6 positions.
• Features dehorned corners and melted contours for snag-free handling.
• Kit includes the buffer, buffer spring, tear-drop ring, and castle nut.
• Made in the USA.

Frequently Asked Questions

Does this kit include the buffer and hardware? Yes, the buffer, buffer spring, tear-drop ring, and castle nut are all included.

How long is this stock? A compact 6.05 inches, in a sub-compact profile.

How many length-of-pull positions does it have? Six.

Buy the UTG PRO Ops Ready S3 Mil-Spec Stock Kit, Black Synthetic, 6-Position

Get a complete, heavy-duty stock kit with every part needed to finish the install. Order the Leapers UTG PRO Ops Ready S3 Stock Kit from our rifle stocks selection. Ships fast from a Lubbock, TX gun shop.