Build a dependable AR-15/M4 platform with the BATTLEARMS WORKHORSE 16-inch complete upper receiver. This black, ready-to-install assembly pairs a forged 7075-T6 aluminum receiver with a nitride-finished 16-inch barrel, delivering a practical foundation for range use, duty applications, or a compatible mil-spec lower receiver upgrade.
Supplied with a full-auto rated bolt carrier group and RACK-15-C ambidextrous charging handle, the WORKHORSE package is designed for convenient installation and ergonomic operation from either side. Its mid-length gas system supports a smooth recoil impulse, while the free-float M-LOK handguard provides versatile mounting options for compatible accessories.
- Complete black AR-15/M4 upper receiver assembly, ready to install on a compatible mil-spec lower.
- 16-inch 4150 chrome-moly vanadium barrel with a durable nitride finish.
- 5.56 NATO / .223 Rem configuration; confirm exact chamber specifications before ordering.
- Forged 7075-T6 aluminum receiver with M4 feed ramps and hardcoat anodized finish.
- Mid-length gas system for a balanced cycling experience and reduced felt recoil.
- Free-float M-LOK handguard supports modular accessory placement.
- Includes full-auto rated BCG, RACK-15-C ambidextrous charging handle, barrel nut, and mounting hardware.
- Designed for standard AR-15/M4 components and compatible 5.56/.223 magazines.
- Barrel twist, handguard length, threading, and other details may vary by production run; verify specifications for your build.
Choose the BATTLEARMS WORKHORSE complete upper receiver for a straightforward, feature-rich AR-15 build or upgrade. Purchasers are responsible for compliance with applicable laws. An FFL or additional requirements may apply by location. California Proposition 65 warning: This product can expose you to lead and other chemicals known to cause cancer or reproductive harm. See P65Warnings.ca.gov.
