New for 2021: CMMG Mk9 Radial Delayed Blowback

by
posted on March 18, 2021
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
cmmg-inc-mk9-pistol-caliber-carbine-radial-delayed-f.jpg
CMMG built its business by offering quality, dependable pistol-caliber carbines, and the company has now come full-circle by updating its oldest model, the Mk9, with the revolutionary Radial Delayed Blowback operating system.

Traditionally, pistol-caliber carbines have incorporated a direct-blowback operating system. While this offers a simple, trouble-free mechanism, blowback operation as applied to 9 mm and other larger calibers comes with a host of assorted issues. Bolts have to be heavier to prevent early opening of the breech, which makes these PCCs heavier, and when the action begins reciprocating, that heavy bolt contributes to greater felt recoil and increased wear in the firearm.

CMMG's Radial Delayed Blowback operating system offered a new way to safely operate a pistol-caliber platform while eliminating some of the drawbacks found in a simple direct-blowback action. The bolt on CMMG's system angular locking lugs that prevent the bolt from unlocking until chamber pressures drop to a safe level. This system still operates on the principle of direct pressure applied from the chamber rather than a gas system, but the locking lugs and delayed opening allows for the use of a lighter bolt, thereby lightening the gun and reducing felt recoil.

CMMG's Mk9 pistol-caliber platform is the latest design in the company's lineup to incorporate the Radial Delayed Blowback system. These Mk9 platforms are available in Banshee and Resolute options. The Banshee is outfitted as a non-NFA pistol or a short-barreled rifle with barrel lengths of 5" or 8", while the Resolute is offered as a carbine with a 16" barrel. Both guns are designed to feed from Colt SMG-pattern 9 mm magazines and feature last-round bolt hold-open.

Suggested retail pricing on the guns start at $1,099.95. For more information, visit cmmg.com.

Latest

Henry New SPD Models 01
Henry New SPD Models 01

Henry Introduces Two New Special Products Division Rifles: The CRUSR & PREDATOR

Henry Repeating Arms' Special Products Division expanded its offerings with two new rifles in the fall of 2025, the CRUSR and PREDATOR lever-actions.

Preview: Duracell 3000L Tri-Power Lantern

The company renowned for its Coppertop batteries now offers a high-tech take on traditional camp illumination.

Gun Of The Week: Colt Kodiak

The Kodiak, introduced in 2024, is based on the company’s iconic Anaconda design, which was brought back to the market in 2021.

The Armed Citizen® Dec. 12, 2025

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

The French Charleville: Workhorse Of The American Revolution

Often overlooked, the French "Charleville" infantry musket was one of the most significant longarms of the 18th and 19th centuries and was integral to the success of the Continental Army during the American Revolution.

Lisa Tuason Appointed Interim CEO of Armscor/Rock Island Armory

Following the unexpected passing of Armscor President and CEO Martin Tuason in November, Lisa Tuason was appointed as interim CEO in early December, ensuring continued family leadership.

Interests



Get the best of American Rifleman delivered to your inbox.