Palmetto State Armory (PSA) PA-9 Upper PCC Gen4 8" 9mm Complete Upper w/ 7" Lightweight M-LOK Rail
PSA Gen4 PA-9 upper receiver assembly for 9mm AR builds, set up as a complete blowback-operated upper. This configuration features an 8" 9mm (9x19) nitride-treated barrel with a 1:10 twist and a PSA 7" Lightweight M-LOK free-float handguard.
Includes the 9mm bolt carrier group (bolt marked 'G4-9') and charging handle, along with the assembled upper receiver.

