Experience the pinnacle of 9mm AR performance with the 8 inches BANSHEE upper group from CMMG. Featuring a compact yet potent design, this 9mm upper leverages CMMG's innovative Radial Delayed Blowback (RDB) technology. This advanced system not only enhances shooting comfort with a softer recoil impulse but also allows for seamless compatibility with a variety of lower and magazine configurations. CMMG 9mm uppers are engineered to work flawlessly with standard AR-15/MK4 lowers and 9 AR conversion mags, as well as several pistol magazine lowers: MK9 (Colt-pattern mags), MKGs (Glock-pattern mags) and MK17 (Sig P320 mags). Available in a range of cerakote finishes to suit your style, all CMMG upper groups come complete with a bolt carrier group and essential Zeroed accessories, including: Zeroed AR-15 polymer dust cover, Zeroed AR-15 ambi charging handle and Zeroed linear compensator 9mm. Originally developed for their .45 ACP MKG platform, CMMG has seamlessly integrated their Radial Delayed Blowback system across their entire pistol caliber lineup. This technology not only reduces bolt weight but also optimizes performance compared to traditional straight blowback systems, ensuring reliability and accuracy in every shot.

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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.