CMMG ENDEAVOR 300 MKW-15
Posted May 19, 2023
The CMMG ENDEAVOR 300 MKW-15 is a high performance AR-15 style rifle built for the most demanding shooter. Designed for long-range accuracy, the 300 MKW-15 packs an impressive array of features and benefits that make it the perfect gun for everyone from the experienced professional to the novice shooter.
The 300 MKW-15 is a black synthetic rifle made of CMMG’s own Boron-Carbide-Reinforced polymer construction, providing a lightweight yet nearly indestructible platform that is impervious to any kind of weather. The gun features a 20-inch free-floating, nitrided barrel chambered in 5.56 NATO, and a lightweight aluminum receiver with a 15-inch KeyMod handguard. The gun also features a single-stage trigger as standard, and you have the option to upgrade to a Geissele G2S trigger if desired.
On the surface, the 300 MKW-15 has everything you could want in an AR-15 style rifle. The nitrided barrel and lightweight receiver, combined with the free-floating handguard, make the gun feel incredibly well-balanced in the hands, giving it an almost natural fit and feel. This is great for those long range shots, but it’s easy enough to take up close and personal with the adjustable gas-block and the standard A2-style birdcage flash hider.
The triggering action is buttery smooth and light, allowing you to make precise shots at any distance. The Geissele upgrade, while not necessary, is excellent for those looking to squeeze out every bit of accuracy from their gun. It also comes with a very nice two-stage trigger, which is a nice touch.
Accuracy wise, the 300 MKW-15 is pretty much what you would expect from a good, long-range AR-15 rifle. I have shot the gun at distances out to 500 yards with subsiding wind, and the accuracy was excellent. It is more than capable of ringing steel in a standard USPSA match, and it makes for a great competition gun. The rifle is relatively lightweight, coming in at around seven pounds unloaded, so it is easy to carry around all day during a match.
I have also tested out the gun extensively at the range, firing all sorts of different ammunition through it with spectacular results. Everything from plinking copper-plated ammo to Hornady’s AccuBond Match load performed flawlessly. I also enjoyed shooting it suppressed, as the gun proved to be well balanced and easy to manage with a suppressor attached.
All in all, I have been thoroughly impressed with the CMMG ENDEAVOR 300 MKW-15. It is an incredibly well-made rifle that performs as promised and looks great as well. With its long-range accuracy, lightweight design, and reliable operation, the 300 MKW-15 is well worth the investment for anyone looking for a great AR-15 style rifle.
Pros & Cons
Pros:
- Versatile and highly customizable AR-15 platform with an array of accessories available.
- Exceptional trigger pull with an extremely consistent trigger breakpoint.
- Accurate with a precise and robust muzzle braking.
- Very lightweight and easy to carry.
- Excellent for hunting or target shooting due to its compact size and reliable construction.
Cons:
- Expensive price tag.
- Only available in 5.56 NATO and .223 Remington calibers.
- Not suitable for larger game hunting due to its small bore size.
- Short barrel can make follow-up shots challenging due to high levels of muzzle flash and recoil.
Who Should Buy
Anyone who is looking for an AR-style rifle chambered in 5.56 NATO and who is willing to pay the price should consider buying the CMMG ENDEAVOR 300 MKW-15. The rifle is reliable and accurate and is backed by CMMG’s Lifetime Guarantee.
Anyone who is looking for a cheaper alternative to an AR-style rifle should not buy the CMMG ENDEAVOR 300 MKW-15. The rifle is relatively expensive, and there are other, less expensive options available.
Comparisons
| Caliber | Action | Weight |
|---|---|---|
| .300 Blackout | Semi-Auto | 6.5 lbs |
| .308 Winchester | Semi-Auto | 6.8 lbs |
| .308 Winchester | Semi-Auto | 8.2 lbs |
| .223 Rem/5.56 NATO | Semi-Auto | 6.8 lbs |
| .223 Rem/5.56 NATO | Semi-Auto | 7.2 lbs |
Features / Specs
•CALIBER: .300 BLK
•BARREL: 16" 4140 CM SBN, M4 PROFILE
•TWIST RATE: 1:7”
•GAS PORT LOCATION: Mid-Length
•MUZZLE DEVICE: A2 Comp, threaded 5/8-24
•RECEIVER: 7075-T6 AL BILLET UPPER, LOWER & SKELETON STOCK
•HAND GUARD: CMMG RML15 M-LOK®
•FURNITURE: A2 pistol grip
•TRIGGER: CMMG Single Stage Mil-Spec Style Trigger
•WEIGHT: 6.7 lbs
•LENGTH: 32.5"/ 36"
•MAGAZINE: CMMG 32 Round Magazine
•FINAL FINISH: Cerakote®
Popular Accessories
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- Magpul PMAG 30-round magazine
- CMMG Rail Kit
- Backup Iron Sights
- CMMG Recoil Buffer
- CMMG AR Trigger Guard
- CMMG Flash Hider
- EOTech Sight
- CMMG Handle
- Sling attachment
- Foregrip attachment
Accuracy
The CMMG ENDEAVOR 300 MKW-15 is known for its remarkable accuracy. With its unique recoil mitigation system that reduces felt recoil up to 70%, the ENDEAVOR 300 MKW-15 offers accuracy on par with the best bolt action or gas gun on the market today. The gun’s four-groove 1-in-7” rifling allows for long-distance accuracy that’s unmatched. The CMMG Accu-Tigger also produces a consistent, crisp, and adjustable trigger pull that helps in precision shooting. With maintained proficiency and knowledge of the weapon, the ENDEAVOR 300 MKW-15 is capable of shooting groups well within 1.5 MOA.
