New: CMMG 5.7x28mm to .22 LR Conversion Kit

by
posted on August 25, 2020
** 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. **
new-project.png (2)

CMMG has expanded its lineup with the addition of the Mk57 .22 LR AR Conversion Kit. Now, you can transform a CMMG 5.7x28mm upper receiver group into a .22 LR by swapping the bolt-carrier group and pairing with an AR-15/Mk4 lower receiver. Add in a dedicated CMMG .22 LR magazine, and you are ready to shoot rimfire.

The Mk57 .22 LR Conversion Kit is designed to be used with all existing CMMG Mk57 5.7x28mm upper receiver groups and bolt/barrel combinations, when paired with any AR-15/Mk4 lower receiver. Plus, no tools are required for installation.

Each kit includes the new .22 LR bolt-carrier group, and the choice of one or three 25-round magazines. In addition, CMMG has Mk57 5.7x28mm complete uppers available, in 5-, 8- and 16-inch barrel lengths.

MSRP ranges from $199.95 to $229.95, depending on the how many magazines you choose to purchase. Something to note, this kit is not compatible with Mk57 lower receiver groups or 5.56mm/.223 Rem. uppers. Learn more at cmmginc.com.


See more: Review: CMMG Resolute Mk4 PCC 9mm

Latest

CMP Buynow 1
CMP Buynow 1

CMP Streamlines Legacy M1 Garand Sales With Easy ‘Buy Now’ Feature

CMP’s new fixed-price “Buy Now” system makes it easier than ever to own a legacy, non-reclaimed M1 Garand rifle.

Watchtower Firearms, Demolition Ranch Team Up For Limited-Edition DEMOLITIA Blackout 1911

Watchtower Firearms releases limited-edition double-stack 1911 chambered in 9 mm designed with input from Demolition Ranch.

Federal Ammunition Honored With National 4-H Shooting Sports Pioneer Award

Federal Ammunition receives 2025 4-H Shooting Sports Pioneer Award for over 40 years of support for youth programs.

New: Smith & Wesson M&P 15 AXE Rifles

Smith & Wesson launches the M&P 15 AXE lineup of suppressor-ready rifles with reduced gas blowback and modern features.

Review: Savage Arms Mark II & Winchester’s .21 Sharp

As demonstrated in the Savage Mark II FV-SR, Winchester’s .21 Sharp cartridge offers higher velocity and greater precision than .22 Long Rifle rounds.

Marsh Edges Stine In Canadian Showdown To Win Lapua Monarch Cup Opener

Justin Marsh edges Jake Stine by one point to win the Canadian NRA Smallbore Silhouette Nationals and first stage of the 2025 Lapua Monarch Cup.

Interests



Get the best of Shooting Sports USA delivered to your inbox.