FAB Defense GL-Core S CQB Buttstock AR-15/M4 Black Polymer

The FAB Defense GL-Core S is a compact CQB-optimized combat buttstock purpose-built for AR-15 and M4 platforms. Developed in cooperation with one of Israel's premier counter-terrorism units to serve as a primary stock, the GL-Core S delivers a rugged yet lightweight solution for close-quarters battle while still retaining stability for mid-range work.

Constructed from a fiberglass-reinforced polymer composite, the GL-Core S measures 9.4 inches long by 2.5 inches tall and weighs just 0.67 lbs, keeping the carbine light and maneuverable during dynamic engagements. The matte black finish blends in with most rifle builds and holds up to hard field use, scuffs, and the routine abuse of training and duty cycles.

A flat-faced rubberized butt-pad is designed for comfortable shoulder contact both with and without body armor, while the integrated cheek weld is optimized specifically for the M4/AR-15 platform to deliver a consistent sight picture and repeatable head placement shot after shot. The small, compact profile keeps the shooter close to the rifle for fast target transitions in tight spaces and reduces snag hazards during vehicle work and room entry.

The GL-Core S mounts to a standard AR-15/M4 receiver extension tube of your choice (tube not included). Whether you are building a dedicated CQB carbine or simply want a more compact, armor-friendly stock for duty, home defense, or tactical applications, the FAB Defense GL-Core S delivers proven Israeli-spec combat performance in a streamlined, easy-to-handle package.