Rock River Arms has earned a reputation for crafting high-quality firearms trusted by military, law enforcement, hunters and shooting enthusiasts of all disciplines. Their complete upper receivers are an excellent choice for finishing a rifle build or swiftly changing calibers on your favorite AR-15. This complete upper receiver is equipped with a .223 Wylde chamber, optimized for both 5.56x45mm NATO and .223 Remington ammunition. It features an 18 inches stainless steel heavy match barrel complemented by a muzzle brake, enhancing accuracy by reducing felt recoil for smoother follow-up shots. The upper includes a lightweight aluminum free-float handguard with M-LOK slots, allowing easy attachment of M-LOK compatible accessories such as bipods, foregrips and lights. Additionally, it comes complete with a bolt carrier group and charging handle, making it ready-to attach to any standard AR-15 lower receiver.

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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.