The American Defense ADM4 is a semi-automatic rifle chambered in 5.56mm NATO / .223 Remington with a 16-inch barrel, 30-round capacity, and a matte black finish. It weighs 10 lbs. Part number ADM4R5BLKM1MLOK016, MSRP $1600. 
 

Key Specifications 

• Model: ADM4 
• Action: Semi-Automatic 
• Caliber: 5.56mm NATO / .223 Remington 
• Barrel Length: 16 inches 
• Capacity: 30 rounds 
• Weight: 10 lbs. 
• Finish Color: Black 
• Condition: New in Box 
• Manufacturer: American Defense Mfg 
• Manufacturer Part Number: ADM4R5BLKM1MLOK016 
• MSRP: $1600 
   

Detailed Features 

1. 16-Inch Barrel: Standard carbine length for 5.56. Works at close quarters and gives enough velocity for effective performance at mid-range. 
    
2. 30-Round Capacity: Reduces reload frequency in competitive or defensive use. 
    
3. Polymer Grips: Comfortable handling without adding weight. 
    
4. Matte Black Finish: Low-glare and durable against daily handling. 
    
5. Dual Caliber Compatibility: Accepts both 5.56mm NATO and .223 Remington, which gives more flexibility when one or the other is more available or cost-effective. 
    

Usage Scenarios 

• Competitive Shooting: The semi-auto action and 30-round magazine suit multi-target and timed formats. 
• Home Defense: 16 inches is manageable indoors; 30 rounds provides adequate capacity without a reload. 
• Range Use / Training: Familiar AR-platform ergonomics and manageable recoil make it suitable for developing fundamentals.

Feedback on the American Defense ADM4 in 5.56mm is broadly positive, with build quality and reliability cited most often.

Owners consistently note the rifle is well-built — actions are smooth, recoil is light, and it performs accurately at both close and extended distances. The lightweight design is frequently mentioned as a practical advantage for extended range sessions.

Criticism is mainly price-related. At $1600 MSRP, it sits above many competing AR-platform rifles, and some owners feel the premium is not fully justified by the feature set compared to alternatives in the same bracket. Aftermarket accessory compatibility and availability are occasionally noted as minor frustrations.

Customer service impressions are mixed — most report satisfactory interactions, but some have had less positive experiences that color their overall view of the brand.

Net sentiment is positive, particularly among buyers who specifically value American Defense's build standards.