Battle Arms Development WORKHORSE AR15 Upper Assembly - Black | 5.56 NATO | 10.5" Barrel | 9.5" M-LOK Handguard|W/O BCG & Charging Handle

**This Upper Does Not Include BCG or Charging Handle**

Specifications:

• Barrel Length: 10.5in

• 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

• Overall Length: 18.5in

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.