• Battle Arms Development WORKHORSE Complete AR-15 Upper Receiver 16" 5.56 NATO M-LOK
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Battle Arms Development

Battle Arms Development WORKHORSE Complete AR-15 Upper Receiver 16" 5.56 NATO M-LOK

Battle Arms Development WORKHORSE Complete AR-15 Upper Receiver 16" 5.56 NATO M-LOK

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The Battle Arms Development WORKHORSE Complete Upper Receiver is a fully assembled AR-15 upper built around a forged 7075-T6 aircraft-grade aluminum receiver and a free-float M-LOK handguard with attachment points at the 3, 6, and 9 o'clock positions plus a full-length Picatinny rail at 12 o'clock. Its 16-inch barrel is chambered in 5.56 NATO and made from 4150 chrome-moly steel with a black nitride finish, and the assembly ships complete with an AR-15/M16 bolt carrier group featuring a 9310 steel bolt and 8620 black nitride carrier along with a Bad Rack-15 ambidextrous charging handle.

Each upper is individually head-spaced, which supports reliable cycling and straightforward cleaning, and the black anodized finish keeps the receiver and rail consistent in appearance. The combination of a free-float M-LOK rail and full-length top rail suits tactical use, sport shooting, and precision builds where accessories and optics need to be mounted securely.

Key Features

Brand Battle Arms Development
Model WORKHORSE
Type Upper
Caliber 5.56x45mm NATO
Barrel Length 16"
Barrel Material 4150 chrome-moly steel
Barrel Finish Black nitride
Receiver Material 7075-T6 aircraft-grade aluminum
Receiver Finish Black anodized
Handguard Free-float M-LOK with full-length Picatinny top rail
M-LOK Attachment Points 3, 6, and 9 o'clock positions
Bolt Carrier Group AR-15/M16, 9310 steel bolt, 8620 black nitride carrier
Charging Handle Bad Rack-15 Ambidextrous
Condition New

Highlights

  • Forged 7075-T6 aircraft-grade aluminum receiver with black anodized finish
  • 16-inch 5.56 NATO barrel in 4150 chrome-moly steel with black nitride finish
  • Free-float M-LOK handguard with attachment points at 3, 6, and 9 o'clock and full-length Picatinny top rail
  • Includes AR-15/M16 bolt carrier group and Bad Rack-15 ambidextrous charging handle
  • Individually head-spaced for reliability

Compatibility

Chambered in 5.56x45mm NATO and built on the AR-15 platform, this complete upper is compatible with standard AR-15 lower receivers.

What's included

  • WORKHORSE Complete AR-15 Upper Receiver
  • AR-15/M16 Bolt Carrier Group
  • Bad Rack-15 Ambidextrous Charging Handle

Frequently asked questions

What barrel length and caliber does the WORKHORSE upper use?

It has a 16-inch barrel chambered in 5.56 NATO, made from 4150 chrome-moly steel with a black nitride finish.

What is included with the complete upper?

It ships with an AR-15/M16 bolt carrier group (9310 steel bolt, 8620 black nitride carrier) and a Bad Rack-15 ambidextrous charging handle.

What material is the receiver made from?

The receiver is forged from 7075-T6 aircraft-grade aluminum and finished in black anodized coating.

Where are the M-LOK attachment points located?

The free-float handguard has M-LOK slots at the 3, 6, and 9 o'clock positions, with a full-length Picatinny rail at 12 o'clock.

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