CMMG ENDEAVOR MK4 .22 ARC 20 Stainless Rifle

The CMMG Endeavor MK4 .22 ARC 20 Stainless Rifle delivers precision and reliability in a modern platform designed for shooters who demand accuracy without excessive recoil. Built on the proven AR-pattern foundation, this rifle bridges the gap between high-volume training and precision rifle discipline, making it ideal for law enforcement marksmanship programs, competitive shooters, and serious hobbyists seeking a cost-effective platform. The .22 ARC cartridge provides sub-sonic ballistics with inherent suppression compatibility, enabling quiet operation without sacrificing velocity or terminal performance.

The 20-inch stainless steel barrel resists corrosion and maintains dimensional stability across extended shooting sessions, critical for applications where consistent zero retention is non-negotiable. Stainless construction provides superior longevity compared to chrome-moly alternatives, particularly in humid or corrosive environments encountered during field operations or coastal training. At 11.6 pounds, the platform balances controllability with durability—light enough for sustained marksmanship training yet heavy enough to manage muzzle movement during rapid fire. The MK4 designation indicates CMMG's fourth-generation Endeavor system, incorporating refined ergonomics and component quality that reflects military and law enforcement feedback.

This rifle excels for shooters prioritizing accuracy, reduced noise signature, and ammunition economy in training environments where volume matters. The AR-pattern design ensures compatibility with standard tactical accessories, optic mounts, and modular components, allowing customization to match specific mission profiles or personal preference. Law enforcement agencies conducting low-light or sound-sensitive operations will appreciate the inherent subsonic characteristics of .22 ARC, while competitive shooters benefit from the tight accuracy potential and low recoil impulse that enables rapid target transitions. The stainless barrel proves particularly valuable for agencies or ranges with frequent cleaning protocols, as the material resists fouling buildup more effectively than traditional finishes.