The Maxim Defense MD11 is a semi-automatic rifle chambered in .308 WIN / 7.62 NATO with an 18-inch fully floated barrel, 20-round capacity, and a billet 7075 aluminum receiver. It comes in an Urban Grey finish and weighs 9 lbs. 
 

Key Specifications 

• Model: MD11 
• Caliber: .308 WIN / 7.62 NATO 
• Barrel Length: 18 inches 
• Capacity: 20 Rounds 
• Action Type: Direct Impingement (Semi-Automatic) 
• Finish: Urban Grey 
• Frame Material: Billet 7075 Aluminum 
• Receiver Material: 7075 Billet Aluminum 
• Weight: 9 lbs 
   

Features 

The fully floated 18-inch barrel removes handguard contact from the accuracy equation. The Geissele SSA-E trigger gives a clean two-stage break with minimal overtravel. Controls are fully ambidextrous — charging handle, selector switch, and magazine release all work for both hands. The B5 Sop-Mod carbine stock is adjustable. The MLOK handguard system accepts lights, grips, and other accessories without adding bulk. At 9 lbs this is on the heavier end for a semi-auto .308, though the billet 7075 aluminum construction justifies the weight in terms of rigidity.

The Maxim Defense MD11 attracts serious .308 buyers, and the discussion reflects that.

Build quality is the most consistent point of praise. The billet 7075 aluminum receivers and Urban Grey finish get called out as premium construction, and the overall fit comes across well. Accuracy reports at various distances are strong, and the Geissele trigger is a recognized upgrade that shooters notice immediately. The ambidextrous controls are well-received. The .308 caliber versatility — hunting, long-range shooting, home defense — gets mentioned frequently.

Price is the primary objection. The MD11 sits at the upper end of the .308 semi-auto market, and some buyers question the value relative to competitors. Availability of model-specific accessories and parts has come up as a limitation. Some users feel additional muzzle work would help with recoil management at the 9 lb weight.