PSA 10.5" Pistol-Length 300AAC 1/8 PHOSPHATE12" Slant M-LOK Upper with BCG-CH
Palmetto State Armory
Overview
The PSA 10.5" Pistol-Length 300AAC Upper Receiver is a complete assembly designed for the AR-15 platform, featuring a 10.5-inch barrel optimized for the 300 Blackout caliber. With a 1:8 twist rate, this upper enhances stability and accuracy for a variety of bullet weights, while the pistol-length gas system ensures reliable cycling and a compact profile. This upper is commonly found in builds that prioritize maneuverability and performance in short-range engagements.
Specifications
PSA 10.5" Pistol-Length 300AAC 1/8 PHOSPHATE12" Slant M-LOK Upper with BCG-CH
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Build history on GunPartPicker
Builders have been adding the PSA 10.5" Pistol-Length 300AAC 1/8 PHOSPHATE12" Slant M-LOK Upper with BCG-CH to their builds on GunPartPicker since February 2026. All time, it ranks #911 of the 1,642 upper receivers builders have added.
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Frequently Built With
The part most often added in each category by the 4 builds that include this one
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Bravo Company M16 Bolt Carrier Group Black
Fortis SHIFT Vertical Grip - M-LOK
Magpul Magpul B.a.d. Lever
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