Maxim Defense MXM49735 MD15 L 5.56x45mm NATO 30+1 16" Fluted Barrel, FDE Rec/M-LOK Handguard, Black Magpul Furniture, SL-K Stock, MBUS Sights, Blackout Defense Flat Trigger

The Maxim Defense MD15 L is a 5.56 NATO AR-15 built for shooters who want a modern, no-nonsense rifle without unnecessary complications. This is a purpose-built platform that delivers the reliability and accuracy you expect from a quality AR-pattern rifle, configured right out of the box for patrol, sport shooting, and general duty use. At 16 inches of fluted barrel and 33 inches overall length, it strikes a practical balance between maneuverability and velocity—short enough to handle in tight spaces, long enough to deliver 5.56 performance downrange.

The MD15 L features Maxim Defense's free-floating Slimline handguard with full M-LOK compatibility, giving you a clean, monolithic-style upper receiver platform that accepts standard AR accessories without proprietary nonsense. The FDE receiver pairs with black Magpul MOE furniture and a Magpul SL-K stock for a cohesive, functional aesthetic. You also get MBUS backup sights and a Blackout Defense flat trigger out of the box—genuine quality components, not bargain-bin compromises. The 30+1 capacity and standard 1/2x28 barrel thread pitch mean you're working with conventional AR logistics and aftermarket options.

Built from 7075 and 6061 aluminum with nitride finish and Type III anodizing, this rifle is engineered to handle field use without fussing over cosmetics. At 6 lbs 6 oz, it's a reasonably light handler without feeling cheap. Whether you're training at the range, building patrol readiness, or just want a straightforward 5.56 that works, the MD15 L delivers professional-grade capability at a rational price point.

Key Features

• 16-inch fluted barrel in 5.56 NATO for compact handling and consistent accuracy
• Free-floating Slimline handguard with full M-LOK accessory mounting
• FDE receiver with black Magpul MOE furniture and SL-K stock for ergonomic control
• MBUS backup iron sights included
• Blackout Defense flat trigger for consistent trigger breaks
• Nitride barrel and Type III anodized aluminum construction for durability
• 30+1 magazine capacity with standard AR platform reliability
• 1/2x28 barrel threading for mainstream muzzle device compatibility

Specifications

Frequently Asked Questions

What comes with the MD15 L out of the box?

The rifle ships ready to shoot with MBUS backup sights and a Blackout Defense flat trigger already installed. The Magpul MOE SL-K stock and handguard are assembled. You'll need to provide your own optic and magazines if you don't have them on hand.

Is this rifle suitable for patrol and duty use?

Yes. The MD15 L was engineered with law enforcement patrol officers in mind. The 16-inch barrel, compact 33-inch overall length, and battle-proven AR-15 platform make it practical for vehicle carry and dynamic shooting scenarios. The free-floating handguard and flat trigger support accurate shooting fundamentals.

What's the barrel thread pitch, and what muzzle devices fit?

The barrel uses a standard 1/2x28 thread pitch, which means it accepts any common AR-15 muzzle device—flash hiders, compensators, sound suppressors, and brakes all fit without adapters.

Can I add optics and accessories to the M-LOK handguard?

Yes. The free-floating Slimline handguard features full M-LOK compatibility, so you can mount lights, lasers, grips, and other tactical accessories directly to the rails using standard M-LOK fasteners.