Rock River Arms has built a longstanding reputation for manufacturing high-quality firearms trusted by military personnel, law enforcement officers, hunters and shooting enthusiasts of all disciplines. Their complete upper receivers serve as an excellent choice for completing rifle builds or quickly switching calibers on your preferred AR-15 platform. This complete upper receiver is chambered in .350 Legend, a versatile and reliable cartridge. It features a 16 inches chrome moly steel barrel equipped with a muzzle brake, effectively reducing felt recoil and enhancing accuracy for successive shots. Additionally, the upper includes a lightweight aluminum free-float handguard with M-LOK slots, providing easy integration of M-LOK compatible accessories such as bipods, foregrips and lights to customize your setup as desired. Included with the upper are a bolt carrier group, charging handle and magazine, making it ready for direct attachment to any standard AR-15 lower receiver. This setup offers a robust platform that combines Rock River Arms' renowned craftsmanship with the performance capabilities of the .350 Legend cartridge, suitable for a wide range of shooting applications.

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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.