Description
Available from Battle Arms Development, the WORKHORSE® Upper Receiver available in both 10.5” and 16” options! These upper receiver sets do not come with a Charging Handle or Bolt Carrier Group to allow for user customization. Barrel Length: 10.5” and 16” Gas System: Carbine 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: WORKHORSE® 9.5in M-Lok® Free Float Rail and WORKHORSE® 15” M-LOK Free Float Rail Overall Length: 18.5” or 24.5” 10.5” Barrel: Rosco Manufacturing 10.5in 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Mid-length gas system. The barrel is finished with a .750"" diameter low-profile gas block, WORKHORSE® 9.5in M-Lok Free Float Rail, and an A2 flash hider. 16” Barrel: Rosco Manufacturing 16in 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Mid-length gas system. The barrel is finished with a .750"" diameter low-profile gas block, WORKHORSE® 15in M-Lok Free Float Rail, and an A2 flash hider. Upper: Forged 7075-T6 AR upper is hard coat anodized black for durability. Featuring M4 feed ramp cuts, these upper receivers are made in the USA.