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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.
PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight Hex M-LOK Upper - Without BCG & CH
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PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight Hex M-LOK Upper - Without BCG & CH ranked #168 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #137 of the 1,574 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
Updated · from real builds on GunPartPicker
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
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