PSA Complete M4 Upper W/MBUS REAR CALIFORNIA LEGAL - .223/5.56 - FDE

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PRODUCT DETAILS DETAILS Barrel Length: 16" Gas System: Carbine Barrel Profile: M4 Barrel Steel: 4150V Chrome Moly Barrel Finish: Phosphate Chrome Lining: None Muzzle Thread: 1/2-28 Chamber: 5.56 NATO Twist Rate: 1 in 8" Barrel Extension: M4 Diameter at Gas Block: .750" Gas Block Type: F-marked Front Sight Base Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Receiver Type: M4 Handguard Type: Magpul MOE Flat Dark Earth Handguards Bolt Carrier Group Included: Yes Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto Charging Handle Included: Yes Sight: Magpul MBUS Rear Backup Sight, Black Overall Length: 24.5" FEATURES Barrel: Phosphate coated 4150V chrome moly vanadium 16" barrel. Chambered in 5.56 NATO, with a 1:8 twist rate, M4 barrel extension, and a carbine length gas system. Barrel is is finished off with Magpul MOE Flat Dark Earth carbine length handguards, F-Marked gas sight base, and an A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer. Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt, shot peened, gas key hardened to USGI Specifications, fastened with grade 8 screws, and staked per Mil-Spec. Includes: Magpul MBUS Rear Backup Sight, Black