The CMMG Resolute MK4 is a semi-automatic rifle chambered in 338 ARC with a 16.1-inch threaded barrel. It has a 10-round capacity and is finished in Armor Black Cerakote. The MK4 designation places it in CMMG's AR-pattern platform line. 
 

Key Specifications 

• Brand: CMMG 
• Model: Resolute MK4 
• Caliber: 338 ARC 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 16.1 in 
• Color/Finish: Armor Black 
   

Detailed Features 

• 16.1-inch threaded barrel in Armor Black Cerakote 
• AR-pattern (MK4) platform chambered in 338 ARC 
• 10-round magazine included 
• Armor Black Cerakote finish throughout

Owners drawn to the Resolute MK4 in 338 ARC typically want familiar AR-pattern ergonomics with a larger-caliber option. CMMG's Resolute line gets consistent marks for build quality and fit, and the 338 ARC chambering is a specific draw for those hunting or shooting at longer ranges.

Ammunition cost and availability for 338 ARC are the most frequent complaints. The cartridge is niche enough that some owners report difficulty finding it locally and rely on online orders. The 10-round capacity is a limitation mentioned by range shooters who would prefer more rounds per magazine.

The threaded barrel is a commonly noted plus for those running suppressed. The Armor Black Cerakote finish holds up well in field use per owner reports, and CMMG's customer service reputation is generally positive among Resolute owners.