Maxim Defense MD15L 5.56 NATO, 16″ Fluted Barrel, Gray

The Maxim Defense MD15L is an AR-15 style semi-automatic rifle chambered for .223 REM/5.56 NATO with a 16″ fluted barrel. It features a free-floating Slimline handguard that provides M-Rax and M-Slot compatibility and a monolithic-like upper receiver platform. Factory-equipped components include Magpul MBUS flip sights, Magpul SL-K stock and grip, and a Blackout Defense flat trigger. The MD15L is built with military-grade materials and is optimized for use with M855 ball ammunition.

Key Specifications

• The caliber is .223 REM/5.56 NATO.
• The action is Semi-Auto.
• The barrel measures 16″ and is described as Fluted.
• The listed capacity is 30 + 1.
• The rifle weight is 6.38 lbs.
• The overall length is 33″.
• The stock is a Magpul SL-K.
• The sights are Magpul MBUS Front & Rear.
• The trigger is a Blackout Defense Flat.
• The muzzle device is an A2 Flash Hider.

Well-equipped straight from the factory, the MD15L pairs practical, duty-minded features with lightweight aluminum construction and serviceable MIL‑SPEC components. Its combination of a free-floating slimline handguard, Magpul ergonomics, and a reliable standard carbine buffer system makes it a solid option for duty use, range training, and general-purpose fielding where durability and straightforward function matter. The MD15L is aimed at shooters who value proven design and dependable operation in a modern AR platform.