Battle Arms Development WORKHORSE 16″ Upper — 5.56 NATO

The WORKHORSE complete upper receiver from Battle Arms Development is built as a ready-to-install AR-15 upper for range, duty, or precision applications. It centers on a forged 7075-T6 aircraft-grade aluminum receiver mated to a free-float M-LOK rail with attachment points at 3, 6, and 9 o'clock and a full-length Picatinny rail at 12 o'clock. The assembly uses a 4150 chrome-moly steel black nitride barrel and is head-spaced to a matching 9310 steel bolt and 8620 black nitride carrier for consistent operation and simplified maintenance.

Key Specifications

• The barrel length is 16".
• The caliber is .223 Rem/5.56 NATO.
• The receiver is forged from 7075-T6 aircraft-grade aluminum.
• The handguard is a free-float design with M-LOK attachment points at 3, 6, and 9 o'clock.
• The top rail is a full-length Picatinny rail with the WORKHORSE signature notch cut.
• The barrel material and finish are 4150 chrome-moly steel, black nitride.
• The bolt is 9310 steel and the carrier is 8620 steel, black nitride.
• Fitment is for AR-15 platforms.
• The model designation is WORKHORSE.
• Included accessories: Bad Rack-15 Charging Handle, AR15/M16 Bolt Carrier Group.

This WORKHORSE upper combines durable materials and serviceable engineering in a complete package that installs on AR-15 receivers without additional assembly. Its free-float M-LOK handguard and full-length Picatinny rail support optics and accessories while the nitride-treated barrel and robust bolt/carrier combination prioritize consistent function and straightforward upkeep. For informed shooters who want a high-quality, ready-to-run upper with practical features and proven materials, the WORKHORSE is a dependable choice.