Palmetto State Armory

Overview

The PSA 11.5" 5.56 NATO Upper Receiver is a complete assembly designed for AR-15 platforms, featuring an 11.5-inch barrel with a 1:7 twist rate and a carbine-length gas system. This configuration provides reliable cycling and optimal stability for a variety of ammunition types, making it suitable for both tactical and competitive shooting applications. Builders often utilize this upper in short-barreled rifles that prioritize maneuverability while maintaining versatility in caliber options.