PSA 10.5" Pistol-Length 300AAC 1/8 12" Lightweight M-LOK Slant Upper - With BCG, CH, & MBUS Sight Set - 5165449836
Palmetto State Armory
Overview
The PSA 10.5" Pistol-Length 300AAC Upper is a complete upper receiver designed for the AR-15 platform, featuring a 10.5-inch barrel optimized for the 300 Blackout caliber. With a pistol gas system and a 1:8 twist rate, this upper is engineered for reliable cycling with various ammunition types while providing improved accuracy. This setup is particularly suited for builds that prioritize compactness and maneuverability, making it a popular choice for short-barreled rifles and pistol configurations.
Specifications
PSA 10.5" Pistol-Length 300AAC 1/8 12" Lightweight M-LOK Slant Upper - With BCG, CH, & MBUS Sight Set - 5165449836
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Build history on GunPartPicker
Builders have been adding the PSA 10.5" Pistol-Length 300AAC 1/8 12" Lightweight M-LOK Slant Upper - With BCG, CH, & MBUS Sight Set - 5165449836 to their builds on GunPartPicker since January 2026. All time, it ranks #620 of the 1,654 upper receivers builders have added.
Updated · from real builds on GunPartPicker
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Frequently Built With
The part most often added in each category by the builds that include this one
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