The Workhorse complete upper receiver is engineered for peak performance, featuring a forged Workhorse 7075-T6 aircraft-grade aluminum receiver that offers unmatched strength while maintaining a lightweight design. The free-float rail handguard is precision-built with M-LOK attachment points at the 3, 6 and 9 o'clock positions, providing a highly versatile platform for mounting your accessories. A full-length picatinny accessory rail at the 12 o'clock position, with a signature notch cut, aligns seamlessly with the upper receiver for effortless integration of additional gear. Each upper receiver is equipped with a 4150 chrome-moly steel black nitride barrel, offering exceptional durability and precise accuracy for every shot. The barrel is individually head-spaced and paired with a matching 9310 steel bolt and 8620 black nitride carrier, ensuring top-tier reliability and easy maintenance. Designed to meet the demands of serious shooters, the Workhorse upper receiver guarantees durability, performance and reliability in every situation.

The 16 inches barrel offers versatile performance across a range of applications
The Bad Rack-15 C ambidextrous charging handle offers easy operation from both sides, making it versatile for all shooters
Nitride finish, AR-15/M16 Bolt Carrier Group, providing increased performance and longevity with enhanced protection against wear
The free-float M-LOK handguard allows for free-floating barrel integration, ensuring accuracy and reducing the risk of barrel deflection during use
Anodized finish in black offers a sleek, durable appearance while protecting against wear and corrosion

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.