PSA 16″ Mid-Length 5.56 NATO 1:7 Nitride 13.5″ Lightweight Hex M-Lok Upper With BCG & CH, FDE

Barrel Length: 16″

Gas System: Mid-length

Barrel Profile: A2

Barrel Steel: Chrome-Moly Vanadium

Barrel Finish: Nitride

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

Handguard Type: PSA 13.5″ Lightweight Hex Full Picatinny M-Lok Free Float Rail. Flat Dark Earth

Bolt Carrier Group Included: Yes

Bolt Steel: Carpenter 158

Bolt Carrier Profile: Full Auto

Charging Handle Included: Yes

Overall Length: 24.5″