CMMG Endeavor Mk3 20-Inch AR Rifle, 20-Round Magazine

Description

The CMMG Endeavor Mk3 is a semi-automatic AR rifle built around an AR10-sized Mk3 receiver platform. It uses a 20-inch 416 stainless steel barrel with a nitride finish and a threaded muzzle. The configuration includes a CMMG RipStock, polymer grip, muzzle brake, and one magazine.

Key Specifications

• The rifle uses a semi-automatic action for its operating configuration.
• The barrel measures 20 inches, providing the defining length for this rifle configuration.
• The barrel is made from 416 stainless steel and receives a nitride finish.
• The rifle has a Cerakote exterior finish in black.
• The magazine capacity is 20 rounds.
• The barrel uses a 5/8×24 threaded muzzle for compatible muzzle-device installation.
• The rifle includes a CMMG RipStock and a polymer grip.
• A muzzle brake is included in the configuration.
• The rifle ships with one magazine.

The 416 stainless steel barrel and nitride treatment define the barrel assembly, while the black Cerakote finish covers the listed exterior configuration. The threaded muzzle and included muzzle brake add clearly specified features without changing the rifle’s semi-automatic operating system. We stock this configuration for customers seeking an AR rifle with a longer barrel, a 20-round magazine, and CMMG-specific furniture. The product is the CMMG Endeavor Mk3.