One Horse 5.56 NATO 10.5" Complete Upper Receiver

This is a complete 5.56 NATO upper receiver built around a 10.5 inch medium profile barrel on a pistol length gas system. It arrives assembled with a nitride finished bolt carrier group and a charging handle, so it drops onto any mil spec AR-15 lower and the rifle is running. The muzzle is threaded 1/2x28 for a brake, flash hider or suppressor mount.

The handguard is a 10 inch M-LOK rail, which keeps the weight down and lets a light, sling mount or hand stop go exactly where the shooter wants it instead of where a fixed rail allows. A 10.5 inch barrel puts this in short barrel rifle and pistol build territory, where the payoff is a package that clears doorways and vehicle interiors without the muzzle leading the way. For anyone with a spare lower, a complete upper is the shortest path to a second configuration.