$1,466.17
Availability: In Stock
Current Stock: Out of stock
The CMMG Resolute Mk4 5.56mm 16.1" rifle strikes a practical balance between the heft of a full-size platform and the compact handling of a shorter setup. Chambered in 5.56x45mm—the globe's most proven and accessible rifle cartridge—this carbine delivers reliable long-range ballistic performance without the weight penalty of a rifle-length gun. Whether you're building your first AR or rounding out a collection, the Resolute Mk4 5.56 is a no-nonsense choice that handles hunting, sport shooting, and training equally well.
Built on CMMG's Mk4 platform, this rifle accepts standard AR15 accessories, so you can customize it to fit your ergonomics and mission. The EML15 M-LOK handguard balances tactical modularity with a lighter profile than full-length Picatinny rails, offering M-LOK slots at the 3, 6, 9, and 12 o'clock positions for mounting optics, lights, and other essential gear. Inside, you'll find CMMG's ZEROED component suite—a matched set of trigger, muzzle brake, ambi charging handle, and controls designed to work together as a cohesive system. The direct impingement operating system is time-tested, easy to maintain, and runs cool and clean in extended shooting sessions.
At 6.4 lbs and 32.5" in overall length, the Resolute Mk4 5.56 is light enough to carry all day and compact enough to navigate tight quarters without sacrificing sight radius or velocity. It ships with a 30-round Magpul PMAG, a carbine-length buffer system, and CMMG's RipStock, giving you everything needed to get on target right out of the box. The armor black Cerakote finish resists corrosion in harsh conditions. This is a rifle that earns its keep whether you're hunting open country, running courses, or simply practicing solid fundamentals at the range.
| Platform | CMMG Mk4 |
| Caliber | 5.56x45mm |
| Barrel Length | 16.1 inches |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM SBN |
| Operating System | Direct Impingement |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 1/2 x 28 |
| Gas Port | Mid-length |
| Gas Block | 0.750" non-adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Handguard | CMMG EML15 M-LOK |
| Charging Handle | CMMG ZEROED Ambidextrous |
| Pistol Grip | CMMG ZEROED |
| Trigger | ZEROED Drop-In |
| Trigger Guard | CMMG ZEROED |
| Safety Selector | CMMG ZEROED 60/90 Degree Ambidextrous |
| Buffer System | Carbine-length |
| Receiver Extension | CMMG 6-Position Fastback with Ambi Sling Plate |
| Stock | CMMG RipStock |
| Included Magazine | Magpul 30rd PMAG |
| Finish | Armor Black Cerakote |
| Weight | 6.4 lbs |
| Overall Length | 32.5 inches |
Yes. The 5.56x45mm cartridge is used by hunters for varmint and medium game where applicable by local law. The 16.1" barrel provides sufficient velocity for effective range, and the lightweight, ergonomic design makes it easy to carry in the field or from a stand. Always verify caliber legality for your specific game and jurisdiction.
Absolutely. The Resolute Mk4 is built on CMMG's Mk4 platform and accepts standard AR15 accessories. The EML15 handguard has M-LOK slots at 3, 6, 9, and 12 o'clock positions for mounting lights, vertical grips, and other gear. The upper receiver is ready for any Picatinny rail-mounted scope or red dot, and the receiver extension includes an ambi sling plate for quick attachment.
The rifle ships with a 30-round Magpul PMAG magazine, the RipStock installed, and all CMMG ZEROED components assembled. You'll need to supply ammunition and choose your optic or sighting system separately.
Yes. The ambidextrous charging handle, ambidextrous safety selector (60/90 degree), and ambi sling plate make it equally user-friendly for southpaw shooters. The controls are positioned for natural operation from either shoulder.
SKU: 120916758 • Weight: 7oz
Availability: In Stock
Current Stock: Out of stock
The CMMG Resolute Mk4 5.56mm 16.1" rifle strikes a practical balance between the heft of a full-size platform and the compact handling of a shorter setup. Chambered in 5.56x45mm—the globe's most proven and accessible rifle cartridge—this carbine delivers reliable long-range ballistic performance without the weight penalty of a rifle-length gun. Whether you're building your first AR or rounding out a collection, the Resolute Mk4 5.56 is a no-nonsense choice that handles hunting, sport shooting, and training equally well.
Built on CMMG's Mk4 platform, this rifle accepts standard AR15 accessories, so you can customize it to fit your ergonomics and mission. The EML15 M-LOK handguard balances tactical modularity with a lighter profile than full-length Picatinny rails, offering M-LOK slots at the 3, 6, 9, and 12 o'clock positions for mounting optics, lights, and other essential gear. Inside, you'll find CMMG's ZEROED component suite—a matched set of trigger, muzzle brake, ambi charging handle, and controls designed to work together as a cohesive system. The direct impingement operating system is time-tested, easy to maintain, and runs cool and clean in extended shooting sessions.
At 6.4 lbs and 32.5" in overall length, the Resolute Mk4 5.56 is light enough to carry all day and compact enough to navigate tight quarters without sacrificing sight radius or velocity. It ships with a 30-round Magpul PMAG, a carbine-length buffer system, and CMMG's RipStock, giving you everything needed to get on target right out of the box. The armor black Cerakote finish resists corrosion in harsh conditions. This is a rifle that earns its keep whether you're hunting open country, running courses, or simply practicing solid fundamentals at the range.
| Platform | CMMG Mk4 |
| Caliber | 5.56x45mm |
| Barrel Length | 16.1 inches |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM SBN |
| Operating System | Direct Impingement |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 1/2 x 28 |
| Gas Port | Mid-length |
| Gas Block | 0.750" non-adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Handguard | CMMG EML15 M-LOK |
| Charging Handle | CMMG ZEROED Ambidextrous |
| Pistol Grip | CMMG ZEROED |
| Trigger | ZEROED Drop-In |
| Trigger Guard | CMMG ZEROED |
| Safety Selector | CMMG ZEROED 60/90 Degree Ambidextrous |
| Buffer System | Carbine-length |
| Receiver Extension | CMMG 6-Position Fastback with Ambi Sling Plate |
| Stock | CMMG RipStock |
| Included Magazine | Magpul 30rd PMAG |
| Finish | Armor Black Cerakote |
| Weight | 6.4 lbs |
| Overall Length | 32.5 inches |
Yes. The 5.56x45mm cartridge is used by hunters for varmint and medium game where applicable by local law. The 16.1" barrel provides sufficient velocity for effective range, and the lightweight, ergonomic design makes it easy to carry in the field or from a stand. Always verify caliber legality for your specific game and jurisdiction.
Absolutely. The Resolute Mk4 is built on CMMG's Mk4 platform and accepts standard AR15 accessories. The EML15 handguard has M-LOK slots at 3, 6, 9, and 12 o'clock positions for mounting lights, vertical grips, and other gear. The upper receiver is ready for any Picatinny rail-mounted scope or red dot, and the receiver extension includes an ambi sling plate for quick attachment.
The rifle ships with a 30-round Magpul PMAG magazine, the RipStock installed, and all CMMG ZEROED components assembled. You'll need to supply ammunition and choose your optic or sighting system separately.
Yes. The ambidextrous charging handle, ambidextrous safety selector (60/90 degree), and ambi sling plate make it equally user-friendly for southpaw shooters. The controls are positioned for natural operation from either shoulder.
SKU: 120916758 • Weight: 7oz