CMMG Upper Group Kit, BANSHEE, 5.7X28MM, 5″, 3-32rd Magazines

Upper Group Kit, BANSHEE, 5.7X28MM, 5″, 3-32rd Magazines

With incredibly flat shooting performance and low recoil, 5.7×28 excels at closer ranges while still providing ideal penetration, making this a go-to personal defense caliber for many. Equipped with a 5” barrel, this is the most compact 5.7x28mm AR15 upper group CMMG® offers. This 5.7x28mm upper group kit comes with three 32rd magazines and is designed to work with standard AR15/Mk4 lowers. (Upper group will also work with existing CMMG Mk57™ lowers and compatible 5.7x28mm pistol magazines) Available in different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group.

Radial Delayed Blowback™ Operating System

Originally developed for the .45 ACP MkG platform, CMMG has adapted our Radial Delayed Blowback system across our pistol caliber lineup to create pistols and rifles with a softer recoil impulse and reduced bolt weight compared to traditional straight blowback systems. Check out our CMMG Resources article & video to learn more about what sets Radial Delayed Blowback apart.

Lifetime Quality Guarantee

We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.