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SKU: 100801044
Built for shooters who want a configurable AR-15 upper without bundled internals, this Battle Arms Development option leaves room to select a charging handle and bolt carrier group to match the rest of the build. It is offered in 10.5-inch and 16-inch versions and uses a carbine gas system, 5.56 NATO chamber, 1:7 twist, and an A2-profile barrel. The upper also includes an M-LOK handguard, low-profile gas block, and A2 flash hider, with a forged 7075 T6 receiver. It suits hunters and field users who want a straightforward upper assembly for a custom rifle setup.
Available 10.5-inch
16-inch configurations for build flexibility
Sold Without
Charging handle or bolt carrier
Chambered 5.56
A 1:7 twist rate
Carbine Gas
System and low-profile gas block
Includes A2
Flash hider and M-Lok handguard
| 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 source data lists two options: 10.5 inch and 16 inch.
The upper is listed in 5.56 NATO with a 1:7 twist rate.
The listed barrel profile is A2, the barrel steel is 4150 Chrome-Moly Vanadium, the finish is Nitride, chrome lining is not included, and the gas system is Carbine with a low-profile gas block and .750 diameter at the gas block.
The receiver material is listed as forged 7075 T6, the muzzle thread is 1/2-28, and the muzzle device is an A2 Flash Hider.