CMMG Resolute MK4 300 Blackout 14.5" Barrel TiN Coated AR-15

The CMMG Resolute MK4 in 300 Blackout delivers superior suppressed and subsonic performance in a compact 14.5-inch configuration. This rifle features titanium nitride coating for enhanced durability and corrosion resistance across all operating conditions.

What Makes This Different

The Resolute MK4 incorporates CMMG's proven gas system engineering specifically optimized for 300 Blackout's unique ballistic requirements. Unlike standard AR-15 platforms, this rifle includes enhanced bolt geometry and gas port sizing that ensures reliable cycling with both supersonic and subsonic ammunition. The titanium nitride finish provides 85% greater surface hardness compared to standard phosphate coatings while maintaining precise tolerances.

Key Features

• 14.5-inch barrel with titanium nitride coating for extended service life
• Chambered in 300 AAC Blackout for versatile ammunition compatibility
• CMMG's proprietary gas system tuned for subsonic performance
• Forged 7075-T6 aluminum upper and lower receivers
• M-LOK compatible handguard with full-length top rail
• Single-stage trigger group with 6-pound pull weight
• Six-position collapsible stock with standard carbine buffer system

Field testing demonstrates consistent 2 MOA accuracy with quality ammunition across various grain weights from 110 to 220 grains. The rifle functions reliably in temperatures from -20°F to 140°F with minimal point-of-impact shift. Suppressor-ready threading and optimized gas pressure reduce back-pressure when running sound suppressors, making it suitable for tactical applications and hunting scenarios requiring noise reduction.

Technical Specs

• Caliber: 300 AAC Blackout (.300 BLK)
• Barrel Length: 14.5 inches with 1:7 twist rate
• Overall Length: 32.25-35.25 inches (stock collapsed/extended)
• Weight: 6.8 pounds unloaded
• Finish: Titanium Nitride coating on barrel and bolt carrier group
• Magazine Capacity: Compatible with standard AR-15 magazines
• Thread Pitch: 5/8x24 TPI for suppressor mounting
• Manufactured in the USA with limited lifetime warranty

This configuration represents CMMG's commitment to precision manufacturing and functional reliability. The titanium nitride treatment extends component life while the 300 Blackout chambering provides tactical versatility in a proven platform.