PSA Gen4 10.5″ 9mm 1/10 Nitride 9″ Lightweight M-lok Railed Upper – With BCG & CH
Barrel: 10.5″ chrome moly steel barrel. Chambered in 9mm, (9×19), with a 1/10 twist. The barrel is nitride treated for durability and finished off with a Palmetto State Armory 9″ Lightweight M-lok free-float rail and a 9mm birdcage flash hider. Muzzle Thread: 1/2-36
Upper: Billet 7075-T6 A3 AR upper is hard coat anodized black for durability. These slick side upper receivers are made for us right here in the USA.
Bolt Carrier Group: Gen 4 Hybrid 9mm BCG. Nitride treated 8620 steel, with enhanced firing pin and external 5.56 style extractor. The bolt carrier group is compatible with most aftermarket fire control groups.
Us this upper for your AR-9 build. Works with PSA and other lowers.
NOTE: We also offer the 9mm upper in both 4 and 8″ versions!
As an alternative to the birdcage flash hider, you can get a PSA fluted flash can which we also sell. They help propel the force, fireball, and blast forward as opposed to around the barrel end.
PSA Custom Fluted Flashcan 9mm
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