



Product Description
The Battle Arms Development WORKHORSE complete upper receiver is built around a forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and a free-float WORKHORSE M-LOK handguard for a strong, reliable AR-15/M4 upper. A full-length Picatinny top rail with the signature notch cut provides consistent accessory alignment. The 16-inch 4150 chrome-moly steel barrel features a black nitride finish for durability and accuracy, and is individually headspaced with the included bolt carrier group for dependable performance and easier cleaning. This complete upper includes an ambidextrous Rack-15-C charging handle and arrives in a durable black anodized finish.
Product Highlights
- 16-inch 4150 chrome-moly steel barrel with black nitride finish for long-lasting wear resistance
- Forged WORKHORSE 7075-T6 aluminum upper receiver for strength with AR-15/M4 compatibility
- Free-float 15-inch M-LOK handguard with attachment points at 3, 6, and 9 o'clock plus full-length Picatinny top rail
- Includes AR-15/M16 bolt carrier group and Rack-15-C ambidextrous charging handle
- Carbine-length gas system and A2 flash hider with 1/2-28 muzzle threads
Specs
- Brand: Battle Arms Development
- Manufacturer Part Number: WH-UR16B-Y-15C
- UPC: 810033786167
- Platform: AR-15/M4
- Barrel Length: 16 in
- Chamber: .223 Wylde
- Gas System: Carbine
- Barrel Profile: A2
- Barrel Steel: 4150 Chrome-Moly Vanadium
- Barrel Finish: Nitride
- Twist Rate: 1:8
- Receiver Material: Forged 7075-T6 aluminum
- Receiver Type: M4
- Handguard: WORKHORSE 15 in M-LOK free-float rail
- Muzzle Thread: 1/2-28
- Muzzle Device: A2 flash hider
- Gas Block Diameter: 0.750 in
- Bolt Carrier Group Included: Yes
- Charging Handle Included: Yes, ambidextrous (Rack-15-C)
- Overall Length: 24.875 in
- Color/Finish: Black anodized
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