Expo Arms 5.56 NATO AR-15 Barreled Upper Receiver Group - 10.5"

Overrun stock at a value price — a complete Expo Arms barreled upper ready to drop onto your mil-spec lower. The Expo Arms 5.56 NATO Barreled Upper Receiver Group delivers a 10.5-inch 1:7 twist barrel on a carbine direct-impingement gas system with a free-float M-LOK handguard and flash hider, without a BCG or charging handle, giving you the flexibility to run your preferred components.

The Expo Arms 5.56 NATO AR-15 Barreled Upper Receiver Group is a 10.5-inch direct-impingement carbine-length gas system barreled upper for mil-spec AR-15 lower receivers, featuring a 1:7 twist 1/2x28 threaded barrel, free-float M-LOK handguard, and flash hider. BCG and charging handle not included. Overrun stock.

Three features define this upper's value for compact 5.56 builds. The 10.5-inch barrel provides the most common compact AR-15 pistol and SBR configuration length, balancing maneuverability with sufficient dwell time for reliable cycling on a carbine-length direct-impingement gas system. A 1:7 twist rate stabilizes the full range of commonly available 5.56 projectile weights from 55-grain training loads to 77-grain match projectiles, maintaining versatility across the ammunition spectrum without load-specific limitations. The free-float M-LOK handguard provides direct accessory attachment for lights, grips, and other hardware while isolating the barrel from handguard contact forces that can affect point-of-impact consistency under varying grip pressure.

Compatible with mil-spec AR-15 lower receivers. 10.5-inch barrel, 1/2x28 threaded muzzle. Carbine-length direct-impingement gas system. BCG and charging handle not included.

5.56 NATO. 1:7 twist. Carbine direct-impingement gas system. Free-float M-LOK handguard. Flash hider.

Built for compact AR-15 pistol and SBR configurations where a value-priced overrun barreled upper is the right starting point for a custom short-barrel build.

By Expo Arms. Overrun stock — availability may be limited. BCG and charging handle not included. Standard Expo Arms warranty applies.