Palmetto State Armory

Overview

The PSA 11.5" 5.56 Upper Receiver is a complete assembly designed for the AR-15 platform, featuring an 11.5-inch barrel optimized for 5.56 NATO cartridges. With a carbine-length gas system and a 1:7 twist rate, this upper ensures reliable cycling and improved stabilization of a wide range of bullet weights, making it suitable for close-quarters engagements and tactical applications. Builders often incorporate this upper into compact, maneuverable setups where a shorter barrel is preferred for enhanced handling.