CMMG Endeavor Mk4
CMMG Inc. · Rifle · In Production · 2018
Overview
The CMMG Endeavor Mk4 is the long-range, small-frame (AR-15) member of CMMG's Endeavor line, built around an 18-to-20-inch 416 stainless steel medium-taper barrel for extended-distance accuracy. Chambered standard in 5.56x45mm NATO with a 1:7 twist, the Endeavor Mk4 is also offered in flatter-shooting long-range AR-15 cartridges including 6.5 Grendel, 6mm ARC, .22 ARC, and .224 Valkyrie. It pairs a rifle-length gas system and adjustable gas block with CMMG's ZEROED enhanced components, a CMMG muzzle brake on a threaded muzzle, an M-LOK free-float handguard, and 7075-T6 aluminum receivers with Cerakote finish. The 18-inch 5.56 configuration weighs about 7 pounds with an overall length of 37.8 inches. Where the Resolute is CMMG's general-purpose 16.1-inch carbine, the Endeavor trades a small amount of maneuverability for the velocity and precision of a longer barrel.
Specifications
| Weight (empty) | 3175 g (112.0 oz) |
| Weight (loaded) | 3361 g (118.6 oz) |
| Overall Length | 960 mm (37.80") |
| Barrel Length | 457 mm (17.99") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Trigger Pull | 28 N (6.3 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 945 m/s (3100 fps) |
| Muzzle Energy | 1790 J (1320 ft·lbf) |
| Effective Range | 600 m (656 yd) |
| Maximum Range | 3600 m (3937 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Aluminum Alloy |
| Barrel Material | Stainless Steel |
| Stock Material | Polymer |
| Finish | Cerakote |
Calibers
- 5.56x45mm NATO · primary · 5.56x45mm NATO — also known as 5.56mm NATO, 5.56x45mm, .223 Remington
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety Selector, Firing Pin Safety
- Features: M Lok Handguard, Free Floating Handguard, Ambidextrous Controls, Ar15 Pattern, Picatinny Rail, Threaded Barrel, Fixed Stock, Single Stage Trigger, Muzzle Brake, Match Barrel, Adjustable Gas System
Variants
- Endeavor Mk4 6.5 Grendel — Caliber Variant
- Endeavor Mk4 6mm ARC — Caliber Variant
- Endeavor Mk4 .22 ARC — Caliber Variant
- Endeavor Mk4 .224 Valkyrie — Caliber Variant
- Endeavor Mk4 20" — Barrel Length
Production
Production years: 2018-present
Exact production numbers not disclosed by CMMG.
Origin
Country of origin: United States
Notes
MSRP approximately $1,275-1,500 depending on configuration. The Endeavor is CMMG's long-range family (18-24" barrels). The Mk4 is the AR-15 small-frame version; the Endeavor Mk3 is the AR-10 large-frame version. Endeavor rifles often ship with precision stocks and match-grade stainless barrels.
Background
CMMG positioned the Endeavor as the precision sibling to the Resolute, chambering it early in emerging long-range AR-15 cartridges like 6mm ARC and 6.5 Grendel to extend the small-frame AR's effective range.