Battle Arms Development WORKHORSE 16in Upper .223/5.56 Black

The WORKHORSE complete upper receiver is centered on a forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and a free-float rail handguard designed for modular attachment. The handguard features M-LOK slots at 3, 6, and 9 o’clock and a full-length Picatinny rail at 12 o’clock with the signature notch that matches the upper receiver. It is fitted with a 4150 chrome-moly steel barrel finished in black nitride and is individually head-spaced to a matching 9310 steel bolt and 8620 steel carrier finished in black nitride. Accessories listed for the assembly include the Bad Rack-15 C charging handle and an AR15/M16 bolt carrier group.

Key Specifications

• The model is WORKHORSE.
• Designed to fit the AR-15 platform.
• Chambered for .223 Rem / 5.56 NATO.
• The barrel measures 16-inch in length.
• The receiver is made from 7075-T6 forged aluminum.
• The barrel is 4150 chrome-moly steel with a black nitride finish.
• The bolt and carrier are a 9310 steel bolt and 8620 steel carrier with black nitride.
• Features a free-float M-LOK handguard with attachment points at 3, 6, and 9 o’clock.
• Includes a full-length Picatinny rail at 12 o’clock with the signature matching notch.
• Accessories specified include a Bad Rack-15 C charging handle and AR15/M16 bolt carrier group.

Built for modular AR-15 assemblies, the WORKHORSE upper combines forged receiver construction, hardened barrel steel, and a matched bolt/carrier set to provide a durable, serviceable foundation for range-oriented shooting and custom builds. Its M-LOK handguard and full-length Picatinny rail make accessory integration straightforward, while the black nitride finishes offer corrosion resistance and simplified maintenance—an efficient choice for shooters who prioritize reliability and practical performance.