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The .308 Winchester has been putting meat in the freezer and ringing distant steel for decades, and the CMMG Endeavor Mk3 is built to get everything the cartridge has to offer. At its heart is a 20 inch 416 stainless steel barrel with a salt bath nitride finish and a 1:10 twist, running a rifle-length gas system for that smooth, soft-cycling feel big-bore AR fans appreciate. The muzzle comes threaded 5/8×24 with CMMG's ZEROED brake already installed, which takes a real bite out of recoil and keeps you on target for follow-up shots.
CMMG machines the Endeavor's upper and lower from billet 7075-T6 aluminum on their Mk3 platform, which follows the familiar LR-308/DPMS Gen 1 high-pattern design. That matters for two reasons. First, it gives you a proven AR-10 size action that handles .308 pressures all day long. Second, it keeps you in a well-supported parts ecosystem, so magazines, triggers, and accessories are easy to come by. The Armor Black Cerakote finish over the whole package shrugs off weather and hard field use.
The details are where this rifle separates itself. You get CMMG's ZEROED ambidextrous charging handle, a ZEROED 60/90 degree ambi safety selector, and a ZEROED pistol grip, so lefties and righties both get a clean setup without buying extra parts. The EML15 M-LOK handguard free-floats the barrel for consistent accuracy and gives you plenty of real estate for a bipod, light, or sling mount, with Picatinny sections at the front and rear where you need them. A Magpul MOE rifle stock over an A1-length receiver extension gives it a solid, steady cheek weld that suits precision work.
At 8.8 pounds and 41.2 inches overall, the Endeavor Mk3 carries like a purpose-built long-range rig should. It ships with a 20 round Magpul PMAG, so all it needs is glass and ammo before it earns its keep on deer stands, prairie dog towns, or the 600 yard line.
It runs LR-308/SR-25 pattern magazines and ships with one 20 round Magpul PMAG. Since the Mk3 platform follows the DPMS Gen 1 high-pattern design, compatible mags are widely available and affordable, so stocking up for range days is easy.
Yes. The muzzle is threaded 5/8×24, which is the standard thread pitch for most .30 caliber suppressors and muzzle devices. The factory ZEROED brake spins off easily if you want to run a can or a different device.
It makes a strong choice for deer, hogs, and similar game where you want fast follow-up shots and reach. The 20 inch stainless barrel gets full velocity out of .308 loads, and the free-float M-LOK handguard makes mounting a bipod or light simple. At 8.8 pounds bare it carries fine for stand and blind hunting, though it is heavier than a bolt gun for long mountain hikes.
No, it ships optic ready with a full-length Picatinny top rail and no iron sights. Most owners pair it with a variable power scope in the 3-15x or 4-16x range to take advantage of the 20 inch barrel's long-range capability, but a red dot or LPVO works well for closer work.
| UPC | 810144728834 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 38AB70C-AB |
| Action | |
| Barrel Length | 20" |
| Caliber/Gauge | .308 / 7.62 NATO |
| Capacity | 20 |
| Color | Black |
| Model | |
| Shipping Weight | 12.5 |
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