Maxim Defense MD15 L 5.56 NATO 16" Fluted Barrel M-LOK Rifle

The Maxim Defense MD15 L delivers precision engineering in a battle-tested platform chambered in 5.56x45mm NATO. This rifle combines advanced manufacturing techniques with proven components to create a reliable firearm suitable for tactical applications, competitive shooting, and sporting use. The 16-inch fluted barrel provides optimal velocity while reducing overall weight.

What Makes This Different

The MD15 L features a cold hammer-forged, fluted barrel that reduces weight by approximately 20% compared to standard contour barrels while maintaining rigidity and heat dissipation. The M-LOK handguard system allows for direct attachment of accessories without additional rail sections, creating a lighter and more streamlined profile. Magpul furniture throughout ensures consistent ergonomics and proven durability under demanding conditions.

Key Features

• 16-inch cold hammer-forged fluted barrel with 1:7 twist rate for heavy bullet stability
• Free-floating M-LOK handguard with full-length top rail and integrated QD sling mounts
• Magpul SL-K collapsible stock with multiple length of pull positions
• Blackout Defense flat-faced trigger with crisp break and short reset
• Magpul MBUS flip-up iron sights with windage and elevation adjustments
• Standard AR-15 magazine compatibility with 30-round Magpul PMAG included
• Type III hard coat anodized finish in matte black for corrosion resistance

Field testing demonstrates consistent sub-MOA accuracy with match-grade ammunition, while the fluted barrel design maintains accuracy during rapid-fire sequences by improving heat dissipation. The rifle functions reliably in adverse conditions including sand, mud, and temperature extremes from -20°F to 140°F. The M-LOK attachment system provides secure mounting for optics, lights, and other accessories without the weight penalty of traditional quad rails.

Technical Specs

• Caliber: 5.56x45mm NATO/.223 Remington
• Barrel Length: 16 inches, fluted profile, 1:7 twist rate
• Overall Length: 32.5-35.5 inches (stock extended)
• Weight: 6.8 pounds (unloaded)
• Magazine Capacity: 30+1 rounds (with included PMAG)
• Handguard: Free-floating M-LOK, 13-inch length
• Stock: Magpul SL-K collapsible with 6-position buffer tube
• Trigger: Blackout Defense flat-faced, single-stage
• Finish: Type III hard coat anodized aluminum, matte black
• Country of Origin: United States

Maxim Defense backs this rifle with comprehensive quality control testing and a commitment to American manufacturing standards. The MD15 L represents a balanced approach to modern rifle design, incorporating proven components with innovative manufacturing techniques.