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

Roy Weatherby Velocity Web
Roy Weatherby Velocity Web

The Case For Velocity

Although the effects of a bullet's terminal performance had been thoroughly studied by 1955, ammunition pioneer Roy Weatherby sought to prove velocity trumps mass and, as a result, built a reputable business that continues to advance today.

Preview: Kriss Vector CRB Gen 3

The third generation of Kriss’ distinctively shaped Vector line was introduced earlier this year, with the company offering the platform in carbine (CRB), large-format pistol (SDP) and short-barreled rifle (SBR) formats ...

Staccato 2011 HD C3.6: Shrinking The 2011

Following the release of its HD model, which was designed to accept Glock-pattern magazines, Texas-based firearm maker Staccato announced it had developed a smaller, carry-ready variant: the 2011 HD C3.6.

Preview: Heathen Systems Assaulter Bipod Combo

The Heathen Systems Assaulter Bipod features a detachable-leg design that is ultra-low-profile when stowed and requires minimal space on an existing Picatinny rail.

Gun Of The Week: Walther Arms PDP Pro-X PMM Compact

Within Walther Arms' line of Performance Duty Pistols, the Pro-X PMM stands out, thanks to a number of features. We head to the range to see exactly how these upgrades and enhancements impact the design.

The Armed Citizen® Oct. 31, 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.

Interests



Get the best of American Rifleman delivered to your inbox.