CMMG 55A1F0B Resolute FOB 5.56 NATO Semi-Auto Rifle

The CMMG 55A1F0B Resolute FOB delivers precision engineering in a compact semi-automatic rifle platform chambered in 5.56 NATO. This rifle combines CMMG's proven manufacturing quality with tactical features designed for versatility across multiple shooting applications.

What Makes This Different

The Resolute FOB (Forward Operating Base) configuration features a shorter barrel profile optimized for maneuverability without sacrificing accuracy potential. CMMG's proprietary barrel treatment and chamber specifications ensure consistent performance with both 5.56 NATO and .223 Remington ammunition. The rifle incorporates enhanced ergonomics and modularity compared to standard AR-15 platforms, with improved component tolerances that contribute to reliable cycling.

Key Features

• 5.56 NATO/.223 Remington chamber with 1:7 twist rate barrel
• Mid-length gas system for optimal pressure and reduced recoil
• CMMG's enhanced bolt carrier group with improved coating
• Ambidextrous safety selector and charging handle
• Free-floating M-LOK handguard with full-length top rail
• Magpul MOE stock and pistol grip for enhanced ergonomics
• Standard AR-15 magazine compatibility (30-round capacity)

Field performance demonstrates consistent sub-2 MOA accuracy with quality ammunition, making this rifle suitable for competitive shooting, tactical training, and sporting applications. The mid-length gas system reduces felt recoil and muzzle rise compared to carbine-length systems, enabling faster follow-up shots. Weather-resistant finishes on all metal components provide corrosion protection in adverse conditions.

Technical Specs

• Caliber: 5.56 NATO/.223 Remington
• Barrel Length: 16 inches with 1:7 twist rate
• Overall Length: 32.25-35.5 inches (stock collapsed/extended)
• Weight: 6.8 pounds unloaded
• Gas System: Mid-length with adjustable gas block
• Handguard: Free-floating M-LOK compatible
• Finish: Hard coat anodized receiver, nitride barrel
• Magazine Capacity: 30 rounds (state laws apply)
• Manufactured: United States

The CMMG Resolute FOB represents a refined approach to the modern sporting rifle, incorporating proven enhancements that address common performance limitations. Available through authorized dealers with CMMG's standard warranty coverage.