PSA AR-15 UPPER 5.56 16" 1:7 SOCOM NITRIDE 13.5" LIGHTWEIGHT M-LOK W/NIBX BCG, CH, & MBUS SIGHT SET

Barrel Length: 16" Gas System: Midlength Barrel Profile: A2 Barrel Steel: 4150 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 M-Lok Rail Bolt Carrier Group Included: Yes, Nickel Boron BCG Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto Charging Handle Included: Yes Optics: Magpul MBUS Front and Rear Flip-Up Sights, Black