CMMG ENDEAVOR MK4 .22 ARC 20 CHGRN Rifle

The CMMG Endeavor MK4 .22 ARC 20 CHGRN rifle bridges the gap between precision rimfire shooting and modern tactical rifle ergonomics. Chambered in .22 ARC—a proprietary cartridge optimized for accuracy and efficiency—this rifle serves shooters seeking low-recoil training, small-game hunting, and cost-effective marksmanship development. The 20-inch chrome-lined barrel delivers consistent velocity and terminal performance while maintaining the lightweight profile essential for extended shooting sessions and field deployment.

Built on CMMG's proven MK4 platform, the Endeavor features a chrome-lined barrel that enhances corrosion resistance and extends service life in variable conditions—a critical advantage for firearms subjected to repeated cleaning cycles or storage in humid environments. The modular design maintains full compatibility with standard AR-pattern controls and accessories, allowing customization of handguards, optic mounting systems, and furniture without gunsmithing. At 7.2 pounds, the rifle balances controlability with enough mass to minimize felt recoil and support precision shooting discipline, making it ideal for shooters transitioning from centerfire platforms or those prioritizing ammunition economy without sacrificing ergonomic familiarity.

Law enforcement and military personnel use .22 ARC rifles for low-cost, suppressed training that replicates centerfire handling without excessive wear on ranges or ammunition budgets. Competitive shooters and precision enthusiasts benefit from the platform's accuracy potential and modular upgrade path. The Endeavor MK4 pairs seamlessly with AR-compatible rails, Picatinny-mounted optics, and standard tactical accessories, making it an accessible entry point for shooters building their first AR-pattern rifle or expanding a modular inventory. Its compact overall length and manageable recoil impulse make it equally suited for youth instruction and scenarios where noise and signature reduction matter.