PSA 16″ M4 Carbine Upper
The PSA 16″ M4 Carbine upper is chambered in 5.56 NATO, with a barrel with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. The M4 profile barrel is finished with Phosphate. Barrel is finished off with a .750″ diameter low-profile gas block, PSA 13.5″ Lightweight M-Lok Free Float Rail and an A2 flash hider.
The upper is a forged 7075-T6 A3 AR and hard coated anodized black for durability. Featuring M4 feed ramp cuts, these upper receivers are made for us right here in the USA.
Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked.
Barrel Length: 16″
Gas System: Carbine-length
Barrel Profile: M4
Barrel Steel: Chrome-Moly Vanadium
Barrel Finish: Phosphate
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:7
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Hand guard Type: PSA 13.5″ M-Lok Lightweight Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 24.5″
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