The CMMG Endeavor MK4 is an AR-15 platform chambered in 22 ARC with a 20-inch threaded barrel and Titanium Cerakote finish. It has a 30+1 round capacity and ships with a Black Nitride threaded barrel paired to an EML 15-inch M-LOK handguard. The receiver is aluminum and the stock is a Magpul synthetic unit in black. 
 

Key Specifications 

• Brand: CMMG 
• Model: Endeavor MK4 
• Caliber: 22 ARC 
• Action: Semi Auto 
• Capacity: 30+1 
• Barrel Length: 20 inches 
• Color/Finish: Titanium Cerakote 
   

Detailed Features 

• 20-inch threaded barrel with Black Nitride finish 
• Titanium Cerakote on Picatinny rail aluminum receiver 
• EML 15-inch M-LOK handguard 
• Magpul synthetic stock in black 
• CMMG Zeroed grip

Owners of the Endeavor MK4 in 22 ARC regularly call out the Titanium Cerakote finish as one of the cleaner factory looks CMMG has offered. The 20-inch barrel draws praise from those who want to extract full velocity from the 22 ARC cartridge, though a handful of buyers note the rifle tips the scales heavier than a typical 16-inch carbine build.

The M-LOK handguard gets consistent approval for giving a clean mounting surface without unnecessary bulk. The Magpul stock and Zeroed grip are treated as solid baseline furniture, with some owners swapping the grip for personal preference rather than any quality complaint.

Value opinions split along the CMMG premium line. Buyers who prioritize the Titanium Cerakote and the 30+1 capacity treat the price as fair for a factory-finished AR in 22 ARC. Others compare it against bare-bones AR builds and feel the markup is steep, though aftermarket support for the AR-15 platform generally satisfies those who want to customize.