The Great Lakes Firearms and Ammunition AR-10 is a semi-automatic rifle chambered in .300 Win Mag, built around a 24-inch stainless steel barrel with 5R rifling and a 1:10 twist rate. Upper and lower receivers are machined from 7075 aluminum billet. The bolt carrier group and charging handle are custom-designed, and the rifle ships with a Hogue fixed stock. 
 

Key Specifications 

• Model: GL10 
• Caliber: .300 Win Mag 
• Barrel Length: 24 inches 
• Capacity: 5 rounds 
• Weight: 9.25 lbs (overall length of 45.50") 
• Finish: OD Green 
• Condition: New in Box 
   

Detailed Features 

• The 416R stainless steel barrel uses 5R rifling with a 1:10 twist for consistent accuracy at distance. 
• A stainless steel muzzle brake cuts recoil, and the rifle gas system cycles reliably. 
• Upper and lower receivers are 7075 aluminum billet — strong without excess weight. 
• The Hogue fixed stock is comfortable during longer sessions. 
   

Usage 

The .300 Win Mag caliber and 24-inch barrel make this rifle well-suited to large-game hunting and long-range target work. The semi-auto action gives faster follow-up shots than a bolt gun, which matters in field conditions. At 9.25 lbs it is not a lightweight carry rifle, but that weight helps manage recoil from the cartridge.

Owners of the GLF AR-10 in .300 Win Mag generally like what the rifle does at range. The cartridge gets consistent praise for its effectiveness in hunting and longer-range shooting, and the semi-auto action is a practical advantage over bolt guns when a quick follow-up shot matters.

The OD Green finish appeals to shooters who prefer a tactical look, though it is mostly a cosmetic point. Build quality draws positive comments, with most owners satisfied with the aluminum billet receivers and barrel quality.

The weight comes up regularly. At 9.25 lbs the rifle is manageable at the bench or in a stand, but carrying it over rough terrain gets tiring. Price is another recurring topic — buyers who focus on the barrel, BCG, and receiver specs tend to accept the cost; those comparing it to budget-priced alternatives sometimes push back.

A few owners mention needing a break-in period or minor adjustments before the rifle settled into its best performance. That is not unusual for a tighter-tolerance build, but it is worth knowing going in.