CMMG Inc. has taken 5.7x28mm to a whole new level with the release of the 5.7 AR Conversion Magazine. This innovative new magazine holds 40 rounds of 5.7x28mm and is designed to fit and function in a mil-spec AR15 lower receiver when paired with CMMG’s 5.7x28mm Radial Delayed Blowback upper receiver.
The appeal of 5.7x28mm is that it is a small caliber with high velocity designed for a handgun and personal defense weapon (PDW). The cartridge was developed in response to NATO’s request for a replacement for the 9x19mm cartridge.
The 5.7 AR Conversion Magazine is ideal for anyone who has a mil-spec AR15 lower and wants to shoot 5.7x28mm. The 5.7 AR Conversion Magazine provides easy transition from 5.56mm to shooting 5.7x28mm while maintaining familiar controls on existing AR15 lower receivers.
The process of converting an AR15 to shoot 5.7x28mm is simple and quick. First, attach a CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to an existing AR15 lower. Second, insert CMMG’s 5.7x28mm AR Conversion Magazine to safely feed 5.7x28mm ammunition. CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration. The 5.7 AR Conversion Magazine also retains last round bolt hold-open functionality, allowing for faster reloads.
One the greatest benefits of using the 5.7 AR Conversion Magazine is that it allows shooters to enjoy the advantages of CMMG’s patented Radial Delayed Blowback operating system, without the need for a proprietary lower receiver. Radial Delayed Blowback has quickly become the gold standard for pistol caliber carbines, primarily due to the reduction in felt recoil versus direct blowback designs.
CMMG offers a complete line of firearms in BANSHEE and RESOLUTE models that are designed for 5.7 AR Conversion Magazines. Each is built with CMMG’s Mk4 lower receiver and a dedicated 5.7x28mm Radial Delayed Blowback upper receiver and ship with one 5.7 AR Conversion Magazine.
CMMG also offers complete 5.7x28mm upper receivers in BANSHEE and RESOLUTE models that are made with three different barrel lengths: 5, 8 and 16-inch. Each complete upper receiver uses CMMG’s patented Radial Delayed Blowback operating system and is compatible with 5.7 AR Conversion Magazines.
For gun builders, CMMG will also offer 5.7x28mm bolt and barrel kits in 5, 8 and 16-inch barrel lengths. The bolt and barrel kits will be compatible with CMMG Mk57 lower receivers, as well as Mk4/AR15 lower receivers (when used with CMMG 5.7 AR Conversion Magazines).
CMMG’s 5.7 AR Conversion Magazine will be sold both as a single unit and in packs of three to reliably feed and shoot 5.7x28mm ammunition. The MSRP for the 5.7 AR Conversion Magazine is $39.95 and for the three-pack is $99.95.
CMMG is taking pre-orders now and expects to ship by mid-February.