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

Colt Kodiak Gotw 1
Colt Kodiak Gotw 1

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.

Preview: BullyWerx BullyTRAKR

Ultra-compact and stealthy by design, the BullyTRAKR is a discreet electronic tracking device that uses nearby smartphones and Wi-Fi Positioning System (WPS) to keep tabs on valuables through that encrypted WPS technology.

I Have This Old Gun: P08 Luger

One of the most iconic sidearms ever made, the P08 Luger was a mainstay in the German army from before World War I until the end of World War II.

Interests



Get the best of American Rifleman delivered to your inbox.