The Rock River Arms Mid A4 is a semi-automatic rifle chambered in .308 Winchester (also compatible with 7.62 NATO), with a 16-inch barrel and 20-round capacity. It's built around a forged A4 upper receiver and ships with an RRA 2-stage trigger that has a crisp pull and minimal overtravel. The mid-length handguard gives solid grip and keeps the rifle maneuverable, while the Hogue rubber grip and RRA 6-position CAR stock let you dial in the fit. 
 

Key Specifications 

• Model: Mid A4 
• Caliber: .308 Win (compatible with 7.62 NATO) 
• Barrel Length: 16 inches 
• Capacity: 20 rounds 
• Condition: New in Box 
• Finish Color: Black 
• Manufacturer: Rock River Arms 
• Manufacturer Part Number: 308A1239 
   

Detailed Features 

• Forged A4 Upper Receiver: Durable and lightweight construction. 
• A2 Flash Hider: Reduces muzzle flash in low-light conditions. 
• RRA 2-Stage Trigger: Crisp pull with minimal overtravel for accurate fire. 
• Mid-Length Handguard: Good grip and maneuverability without added weight. 
• Hogue Rubber Grip: Comfortable, stable hold in varied conditions. 
• RRA 6-Position Tactical CAR Stock: Adjustable length of pull for different shooter sizes. 
   
  The rifle is rated at 1.5 MOA at 100 yards. The .308 caliber handles larger game and longer-range shooting well, and the 16-inch barrel keeps the overall length manageable compared to longer variants.

The Rock River A4 .308 in black with a 16-inch barrel gets generally favorable reviews, with a few consistent criticisms.

Build quality is the most cited positive. The solid construction and materials come up regularly from users in both tactical and hunting contexts. Accuracy is another strength mentioned often, with good groupings reported at various distances giving owners confidence in the platform. The 16-inch barrel is seen as a practical balance between power and maneuverability, particularly for home defense and field use. Weight distribution gets positive remarks from most users, who find it comfortable to handle over extended sessions.

On the critical side, some feel the rifle is heavier than comparable .308 platforms, which becomes more noticeable on longer outings. Price is a recurring topic, with most buyers considering it a reasonable investment given the performance, though a few think the market offers competitive alternatives at closer price points. Aftermarket support and accessories specific to this model are also noted as more limited compared to higher-volume platforms.