Product Preview: CMMG 9 AR Conversion Adapters

by
posted on October 29, 2019
** 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-9-arc-adapters.jpg

AR-style pistol-caliber carbines chambered for 9 mm Luger typically require the use of a dedicated 9 mm lower receiver, but CMMG’s 9 AR Conversion (9 ARC) Magazines remove that requirement by allowing any unmodified AR-15 lower to function with the company’s Radial Delayed Blowback 9 mm Luger upper receivers. And taking the versatility of the system even further, CMMG’s 9 AR Conversion Adapters allow any standard (.223 Rem.) 30-round Gen 2 or Gen 3 Magpul PMAGs to be temporarily altered for 9 ARC compatibility. Just remove the magazine’s baseplate retainer and spring, insert the CMMG adapter, compress the spring and slide the factory baseplate back into place. Capable of up to a full 30 rounds of ammunition, the adapters can also be modified to limit capacity to either 10, 15 or 20 rounds. These adapters are available for $30 each, or $80 for a pack of three. For more information, please visit cmmginc.com.

Additional Reading:
NRA Gun of the Week: CMMG Resolute 300 MK4 Rifle
NRA Gun of the Week: CMMG Mk57 Banshee
Product Preview: CMMG RipStock Buttstock Assembly
Tested: CMMG MK4 Banshee .22 LR Pistol

Latest

Allan Cors In Memoriam
Allan Cors In Memoriam

Past NRA President Allan Cors, 1936-2026: Liberty Takes A Loss

One of liberty’s champions, past NRA President Allan D. Cors died on August 10, 2026.

Moving to the Micro Red-Dot: An Old Dog Learns Some New Tricks

After shooting open-sighted handguns for more than 40 years, the author's aging eyes finally caught up to him, and his concealed-carry pistol now sports a red-dot optic.

Record-Setting Number of Women Receive Free Firearms Training in Michigan

Across two days of free training at Recoil Firearms in Taylor, Mich., a record-setting 2,454 women were given hands-on instruction in the safe and effective use of firearms.

7 New Pistol Suppressors for 2026

For handgunners, having a suppressor makes range trips much more comfortable, and many new suppressors have been designed for maximum compatibility across today's most popular handgun styles and chamberings.

A Victory That Ends A Gun Registry

On August 5, U.S. District Judge James Wesley Hendrix of the Northern District of Texas held that key regulatory provisions of the NFA are unconstitutional as applied to certain categories of firearms.

Criminal Clues: Tips to Avoid Appearing Like a Soft Target

You don’t have to be the hardest target, but you don’t want to be the softest. Here are some tips on how to avoid becoming a target for a criminal looking for his or her next opportunity.

Interests



Get the best of American Rifleman delivered to your inbox.