CMMG Resolute Upper 5.7x28mm 16.1in Armor Black

The CMMG Resolute Upper Group is an AR-platform upper chambered in 5.7x28mm with a 16.1-inch barrel and an M-LOK free-float handguard. It is supplied complete with a bolt carrier group and ZEROED accessories to provide a ready-to-install upper for compatible lowers. The design provides compact, carbine-style handling and PDW-oriented ballistics for range use and defensive applications.

Key Specifications

• The caliber is 5.7x28mm.
• The barrel measures 16.1 inches.
• The operating system is Radial Delayed Blowback.
• The barrel twist is 1:9.
• The barrel material is 4140CM SBN.
• The upper receiver is Billet 6061 T6 Aluminum.
• The handguard is a CMMG EML15 M-LOK free-float design.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The muzzle thread specification is 1/2 x 28.
• The finish is Cerakote Standard (Armor Black).

This Resolute Upper Group gives a practical, stable platform for shooters who want the specific performance of 5.7x28mm in an AR-style package. With a free-float M-LOK handguard and CMMG ZEROED components included, it arrives ready to integrate with a compatible lower for range use or personal protection roles where compact handling and controllable ballistics are priorities.