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AR-15Mid-Range

CMMG

CMMG Resolute Mk4 6mm ARC 16.1"

Flat-shooting 6mm ARC small-frame AR-15 for predator and varmint hunting past the range where 5.56 runs out of energy.

Key Highlights

  • Best small-frame AR caliber for coyotes past 300 yards
  • 6mm ARC carries more energy and bucks wind better than 5.56 with mild recoil

Specifications

Price
$1,600
Weight
6 lb 6 oz
Calibers
6mm ARC
Rail Type
mlok

Capability Profile

0-10 Scale Across 8 Axes

Compatibility Tags

family: modern-riflefamily: ar-patternuse: huntinguse: precisiontrigger: ar-fcginterface: picatinny-tophandguard: mlokbarrel: longmag-type: grendelthread: 5/8x24

Overview

The CMMG Resolute Mk4 in 6mm ARC is the answer for coyote hunters who keep getting busted on the long shots a 5.56 carbine cannot make. 6mm ARC was designed to fit the AR-15 magazine well while launching high-BC 6mm bullets at velocities that stay supersonic past 1,000 yards, and on coyotes that translates to flat trajectories and authoritative terminal performance from 300 to 500 yards where 5.56 starts to fade.

The 16.1-inch 416 stainless barrel runs a 1:7.5 twist that stabilizes the heavy 105- to 108-grain match and hunting bullets the cartridge was built around, and the 5/8x24 muzzle threads take the same .30-caliber suppressors a deer or 6.5 Creedmoor rifle uses. Rifle-length gas keeps the action smooth, and CMMG's ZEROED drop-in trigger, EML15 M-LOK handguard, and ambidextrous controls make this a turnkey predator rig rather than a parts bin.

6mm ARC shares the 6.5 Grendel case head, so it feeds from Grendel-pattern magazines and bolts. Budget for a couple of quality Grendel/ARC magazines and confirm your factory loads cycle before opening day. At $1,599.95 MSRP it costs more than a budget 5.56, but no 5.56 carbine matches its reach on fur.

Key Features

  • 16.1" 416 stainless salt-bath-nitride medium-taper barrel, 1:7.5 twist
  • Rifle-length gas system for smooth cycling
  • 5/8x24 threaded muzzle for common .30-caliber suppressors
  • CMMG EML15 M-LOK free-float handguard
  • CMMG ZEROED drop-in trigger
  • Ambidextrous safety selector and CMMG RipStock
  • Includes 10-round 6mm ARC magazine

Pros

  • +Reaches 400-500 yard coyotes that 5.56 cannot
  • +High-BC 6mm bullets buck wind far better than 5.56
  • +Mild recoil keeps you on target for fast follow-ups
  • +5/8x24 threads share suppressors with a .30-cal hunting rifle
  • +CMMG Lifetime Warranty

Cons

  • MSRP runs well above a budget 5.56 coyote AR
  • Requires 6.5 Grendel/6mm ARC-pattern magazines and bolt
  • Ammo costs more and is less common than 5.56

Detailed Specifications

caliber
6mm ARC
Barrel Length
16.1 inches
Overall Length
32.5 inches
weight
About 6.4 lbs
Gas System
Rifle-length
Twist Rate
1:7.5
barrel
416 stainless steel, salt bath nitride, medium taper
handguard
CMMG EML15 M-LOK
trigger
CMMG ZEROED drop-in
stock
CMMG RipStock
magazine
CMMG 10-round 6mm ARC magazine
Muzzle Device
5/8x24 threaded muzzle
sku
60A10B5
msrp
$1,599.95

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