CMMG RESOLUTE® MK4 — 5.56 NATO, 16.1" Barrel, Tungsten Cerakote, ZEROED™ Muzzle Brake, 15" Free-Float M-LOK®, ZEROED™ Pistol Grip, CMMG RIPSTOCK®, 30+1, 1 Magazine | 55A9D0B-TNG / 55A9D0BTNG | UPC 810144722818

A Refined, Do-Everything Carbine—Finished in Tungsten

Meet the CMMG RESOLUTE® MK4 chambered in 5.56×45 NATO—a modern AR-15 configured for reliability, controllability, and easy upgrades. Centered on a 16.1" barrel for the perfect blend of velocity and maneuverability, this RESOLUTE features a Tungsten Cerakote® finish, the CMMG ZEROED™ muzzle brake for flatter tracking, a 15" free-float M-LOK® handguard, and CMMG’s quick-adjust RIPSTOCK® for fast, repeatable length-of-pull. Whether your mission is home/property defense, range training, or practical competition, this package is tuned for smooth cycling, optics-ready ergonomics, and dependable accuracy—right out of the box.

Caliber: 5.56 NATO / .223 Rem compatible • Capacity: 30+1 (where legal) • Finish: Tungsten Cerakote® • Models: 55A9D0B-TNG / 55A9D0BTNG • UPC: 810144722818

Why Shooters Choose This RESOLUTE MK4

5.56 NATO Versatility

From inexpensive practice ammo to duty loads, 5.56 NATO offers low recoil, broad availability, and a deep ecosystem of magazines, parts, and accessories.

16.1" Barrel = Sweet-Spot Handling

The 16.1" barrel delivers useful velocity for common bullet weights while keeping the rifle compact enough for indoor work, vehicles, and barricade transitions.

ZEROED™ Muzzle Brake

CMMG’s ZEROED™ brake helps reduce muzzle rise for faster follow-up shots and tighter split times. Pair it with a quality two-point sling for even more control.

15" Free-Float M-LOK® Handguard

A long, free-float rail preserves point of impact under sling/barricade load and gives you ample M-LOK® space for a white light, hand stop, QD sockets, and bipod.

Tungsten Cerakote® Durability

The Tungsten finish is more than a color—it’s a corrosion-resistant, abrasion-tough coating that pairs cleanly with black furniture and optics for a premium, low-glare look.

Ergonomics That Matter

The ZEROED™ pistol grip offers a confident purchase and modern angle, while the RIPSTOCK® makes quick, tool-free length-of-pull adjustments painless—ideal for sharing the rifle or changing kit.

Key Features at a Glance

• Caliber: 5.56×45 NATO (.223 Rem compatible)

• Barrel: 16.1" (threaded muzzle*) with CMMG ZEROED™ muzzle brake

• Handguard: 15" free-float M-LOK® forend, optics-ready Picatinny top

• Furniture: CMMG RIPSTOCK® adjustable stock; ZEROED™ pistol grip

• Controls: AR-pattern manual safety; accepts STANAG magazines

• Finish: Tungsten Cerakote® (upper/lower/handguard finish may vary by batch)

• Capacity: 30 rounds, includes 1 magazine

• Model / UPC: 55A9D0B-TNG / 55A9D0BTNG • 810144722818

*Most 5.56 barrels use 1/2×28 muzzle threads; always verify thread pitch on your serialized spec card before purchasing muzzle devices or mounts.

Note: Small parts (trigger style, gas system length, charging handle, and exact furniture variants) can vary by production run. Check your product label for definitive configuration.

What You’ll Notice at the Range

Flat, Fast Follow-Ups

The combination of ZEROED™ brake, free-float rail, and 5.56 impulse keeps the dot/reticle steady for rapid, accurate strings.

Repeatable Accuracy

Free-float geometry isolates the barrel from sling and barricade pressure, supporting tighter groups and stable zero retention.

Accessory Freedom

The 15" handguard gives you the real estate to place lights, switches, and hand stops exactly where they optimize recoil control and ergonomics.

Ideal Use Cases

• General-Purpose Carbine: Balanced for home/property defense and training

• Practical Competition: 2-Gun/3-Gun ready with quick handling and flat recoil

• Ranch/Field: Durable finish and reliable function with common 5.56 loads

• Skill Builder: Excellent base rifle for new AR shooters that scales with upgrades

Smart Setup Recommendations

• Optic: A micro red dot for speed or an LPVO (1-4× / 1-6×) for distance flexibility

• Sling: Two-point QD sling (use M-LOK® QD cups) for carry and positional stability

• Light: Compact M-LOK® weapon light with momentary tailcap or remote switch

• Mags: Quality 30-rd STANAG magazines; mark and rotate for reliability

• Trigger: Consider a duty-grade single-stage or a crisp two-stage based on role

Technical Specifications (General)

• Platform: AR-15 / MK4

• Caliber: 5.56×45 NATO

• Barrel Length: 16.1" (threaded; pitch varies—verify)

• Muzzle Device: CMMG ZEROED™ muzzle brake (installed)

• Handguard: 15" free-float, M-LOK® compatible

• Upper/Lower: Aluminum, Picatinny optics rail

• Stock: CMMG RIPSTOCK® adjustable

• Grip: ZEROED™ pistol grip

• Finish: Tungsten Cerakote®

• Safety: Manual safety, AR-pattern controls

• Capacity: 30+1 (where permitted); 1 magazine included

• Models: 55A9D0B-TNG / 55A9D0BTNG

• UPC: 810144722818

Frequently Asked Questions

Q: Is the barrel threaded from the factory?
A: Yes, and it ships with the ZEROED™ muzzle brake installed. Confirm thread pitch (commonly 1/2×28) before buying additional devices.

Q: Can I run it suppressed?
A: Typically yes. Use the correct 1/2×28 mount (if applicable) and verify reliable cycling with your chosen ammo. Follow all local laws.

Q: What magazines does it use?
A: Standard AR-15/STANAG pattern magazines from reputable manufacturers.

Q: Difference between RESOLUTE, ENDEAVOR, and BANSHEE?
A: RESOLUTE = general-purpose 16" carbine; ENDEAVOR = precision/longer-barrel focus; BANSHEE = ultra-compact configurations.

SEO-Rich Highlights & Buyer Keywords

• CMMG RESOLUTE MK4 5.56 NATO with 16.1" barrel

• Tungsten Cerakote AR-15, ZEROED muzzle brake, 15" free-float M-LOK

• CMMG RIPSTOCK adjustable stock, ZEROED pistol grip

• 30-round capacity, 1 magazine included

• Models 55A9D0B-TNG / 55A9D0BTNG, UPC 810144722818

Meta Title (SEO)

CMMG RESOLUTE MK4 — 5.56 NATO, 16.1", Tungsten Cerakote, 15" M-LOK, ZEROED Brake | 55A9D0B-TNG

Meta Description (SEO)

Own the CMMG RESOLUTE MK4 in 5.56 NATO with a 16.1" barrel, Tungsten Cerakote, ZEROED muzzle brake, 15" free-float M-LOK handguard, RIPSTOCK, and ZEROED pistol grip. 30-rd capacity (where legal). Model 55A9D0B-TNG / 55A9D0BTNG, UPC 810144722818.

Structured Data (Product Schema JSON-LD)

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Responsible Use Reminder

Follow all local, state, and federal laws regarding firearm ownership, transport, suppressor use, and magazine capacity. Verify your rifle’s exact thread pitch and included components on the product label, confirm reliable function with your preferred ammunition, and practice safe handling and secure storage.

The End