FAB Defense GL-Core CP Buttstock Adjustable Cheekrest AR-15/M4 Black Polymer

The FAB Defense GL-Core CP Buttstock is a lightweight, rugged replacement stock built for AR-15 and M4 carbines. Constructed from fiberglass reinforced polymer composite with a durable matte black finish, it delivers a refined balance of strength, comfort, and weight savings for duty, defense, and sporting builds.

At the heart of the design is an integrated adjustable cheek rest that lets the shooter dial in proper eye-to-optic alignment, paired with an ergonomically shaped rubberized butt-pad that shoulders quickly and stays planted under recoil. An interchangeable tube adapter allows the stock to mount cleanly on both Mil-Spec and Commercial carbine buffer tubes without fitment issues.

For sling carry, the GL-Core CP integrates two quick-detach rear swivel sockets on either side of the stock body, giving the user ambidextrous sling mounting without adapters. Compact, light, and purpose-built, this buttstock is a clean drop-on upgrade for any standard AR-15/M4 carbine.