CMMG have launched their new 5.7 AR conversion kit, individual parts and pistols. The CMMG MK4 5.7 Upper and a 40 round conversion mag will allow any AR-15 to be converted to chamber 5.7x28mm in seconds. The new conversion kits and pistols follow on from the Banshee Mk57 5.7×28 pistol released in 2018, which used the radial delayed blowback action, but fed from FN Five-Seven mags.

With the recent launch of Ruger’s 5.7 pistol and the new Speer Gold Dot 5.7x28mm Self-Defense Ammunition it really does seem like 2020 might be the most exciting year for 5.7x28s since it was introduced nearly 30 years ago! I wonder what other 5.7 products we might see at SHOT 2020.

Here’s CMMG’s announcement in full:

Easily add 5.7x28mm to your collection.

CMMG’s patented Radial Delayed Blowback operating system expertly handles this high performance, low recoil cartridge – 40 rounds at a time!
Plus, the conversion bundle ships directly to your door.

Items have limited availability so order today to get early access. Most Mk5.7 conversion products will begin shipping mid-February.

KEY FEATURES:

• Holds 40 Rounds of 5.7x28mm
• Compatible with AR15/M16 Lower Receivers
• CMMG 5.7 Upper Receiver Required
• Radial Delayed Blowback
• Last-Round Bolt Hold-Open
• Works with Standard Carbine Buffer and Action Spring

The Banshee 300, Mk4, 5.7x28mm pistol comes in a range of finishes including bazooka green, midnight bronze, burnt bronze, OD Green, FDE, titanium, slate and black. The guns have an MSRP of $1,424.95.

Here are the specs for the 5.7 pistol: 

CALIBER: 5.7x28mm
BARREL: 5” 1:9 Twist, Medium Taper 416SS
MUZZLE: Thread Protector, Threaded ½-28
GAS PORT LOCATION: N/A
RECEIVER: Forged 7075-T6 AL M4 type upper, AR15 type lower
HAND GUARD: CMMG RML4 M-Lok hand guard
FINISH: Cerakote Standard
CHARGING HANDLE: CMMG Oversized Ambi
PISTOL GRIP: Magpul MOE
PISTOL BRACE: CMMG Micro/CQB RipBrace with 5 Position Enhanced Receiver Extension and Ambi Sling Plate
TRIGGER: CMMG Single Stage Mil-Spec Style Trigger
TRIGGER GUARD: Magpul MOE
SAFETY SELECTOR: CMMG Ambi
MAGAZINE: 40rd CMMG
WEIGHT: 4lbs 4oz(unloaded)
LENGTH: ” 19.2″(brace collapsed)

Pistol, Banshee™ 300, Mk4, 5.7 x 28mm (CMMG)

MMG’s 5.7 AR Conversion Magazine available as a pack of three for $99.95 (CMMG)

CMMG are also offering their BANSHEE 100 in 5.7, with pistols or SBRs available, and built with CMMG’s Mk4 lower receiver. Check out the specs for the pistol below.  These have an MSRP of $1,099.95.

Pistol, Banshee™ 100, Mk4, 5.7x28mm (CMMG)

Here are the technical specs for the Banshee™ 100, Mk4, 5.7x28mm pistol:

CALIBER: 5.7x28mm
BARREL: 8” 1:9 Twist, Medium Taper 416SS
MUZZLE: A2 Comp, threaded 1/2-28
GAS PORT LOCATION: N/A
RECEIVER: Forged 7075-T6 AL M4 type upper, AR15 type lower
HAND GUARD: CMMG RML7 M-Lok hand guard
FINISH: Hard Coat Anodized Receivers and Hand Guard (Can be upgraded to Cerakote)
CHARGING HANDLE: CMMG Mil-Spec
PISTOL GRIP: CMMG A2
RECEIVER EXTENSION: CMMG Pistol Receiver Extension w/Ambi Sling Plate
TRIGGER: CMMG Single Stage Mil-Spec Style Trigger
TRIGGER GUARD: CMMG Mil-Spec
SAFETY SELECTOR: CMMG Mil-Spec
MAGAZINE: 40rd CMMG
WEIGHT: 4lbs 8oz(unloaded)
LENGTH: 23.9″

Find out more about the 5.7 pistols and conversion kit at cmmginc.com.