• Barrel Length: 7.5″
• Gas System: Carbine length
• Barrel Profile: Carbine
• Barrel Steel: 4150 Chrome-Moly Vanadium
• Barrel Finish: Nitride
• Chrome Lining: None
• Muzzle Thread: 1/2-28
• Chamber: 5.56 NATO
• Twist Rate: 1:8
• 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: IO 7″ Lightweight Keymod Rail
• Bolt Carrier Group Nitrite carrier and parkerized bolt head MPI Included: Yes
• Bolt Steel: Carpenter 158
• Bolt Carrier Profile: Full-auto
• Charging Handle Included: Yes
• Fire Control Group: Mil-Spec
• Overall Length: 24.5″
• Weight: 4.0 lbs
• Barrel Marking: “5.56 NATO 1/8”

Barrel: 7.5″ 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1:8 twist, M4 barrel extension, and a carbine-length gas system. The barrel is finished with with a .750″ diameter low-profile gas block, IO 7″ Lightweight Keymod Float Rail and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper 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. Bolt carrier is nitrited and bolt head parkerized and MPI. Includes Charging Handle.

Lower Build Kit: IO enhanced EPT Lower Build Kit, Black