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 16â€
- 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 24.5â€
- 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.




