The Maxim Defense MD15L is an AR-pattern semi-automatic rifle chambered in 6mm ARC with a 16-inch barrel. It has a Flat Dark Earth Cerakote finish and an M-Lok handguard. The rifle ships with a 10-round magazine. 
 

Key Specifications 

• Brand: Maxim Defense 
• Model: MD15L 
• Caliber: 6mm ARC 
• Action: Semi Auto 
• Capacity: 10 rounds 
• Barrel Length: 16 inches 
• Color/Finish: Flat Dark Earth Cerakote 
   

Detailed Features 

• AR-pattern semi-automatic platform with a 16-inch barrel 
• Flat Dark Earth Cerakote finish applied to the receiver and barrel 
• M-Lok handguard for accessory mounting 
• Ships with a 10-round magazine

Owners of the MD15L pick it primarily for the 6mm ARC chambering. The cartridge is considered a meaningful step up in precision and downrange performance compared to standard 5.56 loads, and most buyers feel the MD15L delivers on that potential. The Flat Dark Earth Cerakote finish is consistently described as durable.

The M-Lok handguard keeps the rifle slim, and the 16-inch barrel is a practical length for general-purpose use. The 10-round capacity is the main friction point in reviews, with buyers in restricted states accepting it as a given and others noting they swap to higher-capacity magazines where legal.

Maxim Defense fit and finish receive positive marks, and the MD15L meets expectations for buyers at this price tier. The trigger is the most commonly upgraded component. Owners who wanted an accurate AR in 6mm ARC are generally satisfied with what the MD15L delivers.