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SKU: 100801043
Built for shooters who want a configurable upper receiver set, this Battle Arms Development option is offered in 10.5-inch and 16-inch versions and arrives without a charging handle or bolt carrier group. It is chambered in 5.56 NATO and includes a carbine gas system, 1:7 twist, low-profile gas block, and A2 flash hider. The forged 7075 T6 receiver and nitride-finished 4150 chrome-moly vanadium barrel make it a practical foundation for a custom AR-15 setup. For hunters and outdoor users who prefer to choose their own internal components, it provides a straightforward starting point without unnecessary extras.
Available 10.5-inch
16-inch configurations for different build
Does Not
Include a bolt carrier group
5.56 Nato
1:7 twist rate
Uses Carbine
A low-profile gas block
Built Forged
A forged 7075-T6 receiver and
| Barrel Extension | M4 |
|---|---|
| Barrel Finish | Nitride |
| Barrel Length | 10.5" and 16" |
| Barrel Profile | A2 |
| Barrel Steel | 4150 Chrome-Moly Vanadium |
| Bolt Carrier Group Included | No |
| Chamber | 5.56 NATO |
| Charging Handle Included | No |
| Diameter At Gas Block | .750 |
| Gas Block Type | Low-profile |
| Gas System | Carbine |
| M Lok | Yes |
| Muzzle Device | A2 Flash Hider |
| Muzzle Thread | 1/2-28 |
| Receiver Material | Forged 7075 T6 |
| Twist Rate | 1:7 |
No. The WORKHORSE upper receiver set is sold without a charging handle or bolt carrier group, allowing the user to choose those components separately.
The product is listed in both 10.5" and 16" options. The title provided here is for the 10.5" upper.
It is chambered in 5.56 NATO and listed with a 1:7 twist rate.
The upper is listed with a carbine gas system and a low-profile gas block. The diameter at the gas block is .750.
The provided specs list an A2 barrel profile, 4150 Chrome-Moly Vanadium barrel steel, nitride finish, no chrome lining, 1/2-28 muzzle thread, M4 barrel extension, an A2 flash hider, and a forged 7075 T6 receiver material.