PSA 10.5" CARBINE-LENGTH 5.56 NATO 1/7 PHOSPHATE 12" LIGHTWEIGHT HEX M-LOK UPPER WITH MBUS SIGHT SET & ROMEO 5 W/BCG & CH

Barrel Length: 10.5" Barrel Profile: A2 Gas System: Carbine-length Barrel Steel: 4150V Chrome Moly Vanadium Barrel Finish: Phosphate Chrome Lining: No 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: PSA Fluted Flash Can Receiver Material: Forged 7075 T6 Aluminum Receiver Type: M4 Handguard Type: PSA 12" Lightweight Hex Full Picatinny M-Lok Free Float Rail Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto Charging Handle Included: Yes Overall Length: 21" Backup Sights: Magpul MBUS Front and Rear Flip-up Sights, Black Optic: Sig Sauer Romeo 5 Red Dot Sight