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Most factory ARs leave you with a shopping list. The CMMG Resolute MK4 hands you the finished product. Out of the box you get a ZEROED drop-in single stage trigger, ambidextrous 60/90 degree safety, ambi charging handle, ambi mag catch with extended release, and CMMG's quick-adjusting RipStock on a 6-position Fastback receiver extension with a built-in ambi sling plate. That is a serious pile of upgrades that would take real time and money to bolt onto a base-model rifle, and here they come standard.
The 300 AAC Blackout cartridge was built to push heavy .30 caliber bullets through the AR-15 platform, and it does two jobs remarkably well. Run subsonic loads through a suppressor and you get one of the quietest centerfire setups you can put together. Load up supersonics and you have a legitimate short-to-mid-range thumper that hangs with 7.62×39 while feeding from standard AR magazines. The 16.1 inch medium taper barrel is 4140 chrome moly with a salt bath nitride treatment, cut with a 1:7 twist that stabilizes everything from light supersonic rounds to 220 grain subsonic pills. Muzzle threads are 5/8×24 behind the included ZEROED muzzle brake, so swapping to your can's mount is a five-minute job.
CMMG machined the upper from billet 6061 aluminum and forged the Mk4 lower from 7075, keeping the whole rifle at a trim 6.2 pounds unloaded with a 32.5 inch overall length. The EML15 M-LOK handguard runs slots along the sides and bottom plus more between the top Picatinny sections, giving you room for lights, a hand stop, or a bipod without stacking on rail weight you do not need. Cerakote over the receivers shrugs off weather and holster wear alike.
A Magpul 30-round PMAG ships in the box, and CMMG backs the rifle with their Lifetime Quality Guarantee. Add an optic and ammo, and this one is ready for the range, the deer stand, or duty by the nightstand.
Yes. The 16.1 inch barrel is threaded 5/8×24 behind the factory-installed ZEROED muzzle brake, which is the standard thread pitch for most 300 Blackout suppressor mounts. The cartridge itself was designed around suppressed shooting, and the 1:7 twist stabilizes heavy subsonic bullets like 190 to 220 grain loads that make suppressed 300 BLK so quiet.
No, it ships without sights. The billet upper has a Picatinny rail that lines up with the rail sections on the EML15 handguard, so you can mount a red dot, LPVO, or backup irons however you like. Most buyers run a dot or a 1-6x scope on this rifle given the practical range of 300 Blackout.
The ZEROED suite covers a drop-in single stage trigger, 60/90 degree ambidextrous safety selector, ambi charging handle, ambi mag catch with extended release button, pistol grip, trigger guard, and the muzzle brake. These are CMMG's American-made upgrade parts that come standard rather than being aftermarket add-ons. Combined with the quick-adjust RipStock, the rifle is genuinely ready to run as delivered.
It can. The 1:7 twist barrel handles the full spread of 300 BLK loadings, from light supersonic hunting and defense rounds to heavy subsonics. Keep in mind that unsuppressed rifles with carbine gas systems sometimes need supersonic ammo or a suppressor's added back pressure to cycle subsonics with full reliability, which is typical of the cartridge rather than this rifle specifically.
| UPC | 810144724034 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 30AE70AAB |
| Action | |
| Barrel Length | 16.1" |
| Caliber/Gauge | .300 AAC Blackout |
| Capacity | 30 + 1 |
| Color | Black |
| Model | |
| Safety | CMMG Zeroed 60/90 Degree |
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