The Rock River LAR15M in .458 SOCOM is an AR-platform rifle that trades the standard 5.56 for a significantly heavier projectile. The two-stage trigger keeps the pull clean with minimal creep, and the 6-position adjustable stock fits a range of shooter sizes. At 7.60 lbs with a 16-inch barrel and 30+1 capacity, it stays manageable despite the larger caliber. 
 

Key Specifications 

• SKU: 2024016130 
• UPC: 842834102068 
• Condition: New in Box 
• Finish: Black 
• Trigger: Two-Stage 
• Grip: Standard 
• Stock: 6-Position Adjustable 
• Weight: 7.60 lbs 
• Length: 37" 
• Barrel Twist: 1:14" 
• Barrel Length: 16" 
• Capacity: 30+1 RD 
• Caliber: .458 SOCOM 
• MPN: SOC1820V1 
• Model Name: LAR15M 
• Brand: Rock River 
   

Features 

The .458 SOCOM round hits substantially harder than 5.56 at shorter distances, which is why this setup draws hunters targeting larger game and shooters who want more terminal energy from an AR-format rifle. The 1:14" twist is matched to the caliber. Rock River's two-stage trigger is a consistent highlight — the first stage takes up slack cleanly, and the break is predictable.

Owners of the Rock River LAR15M .458 SOCOM generally appreciate the stopping power the round brings to an AR-15 platform. The caliber is the main draw — hunters going after deer or larger animals at moderate range are the core audience, and they tend to be satisfied with the terminal performance.

Accuracy and build quality come up positively in most discussions. The two-stage trigger gets specific credit for improving shot consistency. The adjustable stock and ergonomics are workable, fitting different shooter builds without modification.

The recurring criticisms are ammunition cost and availability. .458 SOCOM is a specialty round, so it is more expensive and harder to find than common calibers, which limits practice frequency for some. The rifle's weight sits a bit higher than a standard AR-15, which a few users flag as a drawback for maneuverability. Price opinions are divided — some see it as fair for the quality, others find it steep relative to other .458 SOCOM options on the market.