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Palmetto State Armory
Overview
The PSA 8.5" Pistol-length 300AAC Nitride Upper is a complete assembly designed specifically for the AR-15 platform. With an 8.5-inch barrel length and a pistol gas system, this upper offers reliable performance and efficient cycling, particularly suited for the 300 Blackout caliber. Builders gravitating towards compact, maneuverable setups often choose this upper for their pistol builds.
PSA 8.5" Pistol-length 300AAC Nitride 7" Lightweight M-LOK Upper with BCG & CH
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Builders on GunPartPicker first added the PSA 8.5" Pistol-length 300AAC Nitride 7" Lightweight M-LOK Upper with BCG & CH to a build in January 2026.
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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