CMMG Resolute MK4 | .350 Legend | 16.1″ | 35B5FBCAB

The CMMG Resolute MK4 upper group is a purpose-built AR-15 platform component chambered in .350 Legend and configured for balanced handling. It pairs a 16.10″ barrel and a free-float M-LOK handguard to deliver controllable performance for field and range use. This upper ships with CMMG ZEROED accessories and is offered in an Armor Black Cerakote finish.

Product Specifications

• The UPC is 810097502635.
• The model is Resolute MK4.
• The manufacturer is CMMG.
• The caliber is .350 Legend.
• The barrel measures 16.10″.
• The barrel twist is 1:16.
• The barrel material is 4140CM SBN.
• The muzzle thread is 1/2 x 28.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The operating system is Direct Impingement.
• The gas port location is Carbine.
• The gas block is a 0.750 inch non-adjustable unit.
• The upper receiver is Billet 6061 T6 Aluminum.
• The handguard is a CMMG EML15 M-LOK free-float design finished in Armor Black.
• The charging handle is a CMMG ZEROED Ambi and the finish is Cerakote Standard.

This upper is well-suited for straight-walled cartridge hunting applications where .350 Legend is permitted, and for general-range practice or AR-15 platform builds that require a purpose-built complete upper. The Resolute MK4 combines a stout 4140CM barrel and a free-float M-LOK handguard to keep the system stable and user-friendly across extended sessions on the range.

Whether you are finalizing a precision-minded AR-15 build or assembling a straight-walled cartridge option for eligible hunting seasons, the Resolute MK4 upper offers a turnkey solution with factory-selected components and a durable Cerakote finish.