The Great Lakes Firearms and Ammunition AR-15 in .450 Bushmaster is a semi-automatic rifle built for hunters and shooters who need real stopping power in an AR-platform package. The 18-inch barrel with a compensator muzzle device balances reach with maneuverability, and the OD Green finish is one of the more distinctive options in the catalog. 
 

Key Specifications 

• Model: AR-15 
• Caliber: .450 Bushmaster 
• Barrel Length: 18 inches 
• Capacity: 5 rounds 
• Weight: 8.05 lbs 
• Overall Length: 38.5 inches 
• Rate of Twist: 1:24" 
• Finish Color: OD Green 
• Condition: New in Box 
   

Detailed Features 

 
The semi-auto action cycles .450 Bushmaster without requiring manual cycling between shots. The 18-inch barrel with compensator helps manage the recoil that comes with the caliber -- it's a noticeably heavier-hitting round than 5.56 or .308, and the muzzle device makes a real difference on rapid follow-up shots. The synthetic collapsible stock keeps weight manageable at 8.05 lbs. for a big-bore AR. The 15.25" M-Lok handguard has room for lights, bipods, or grips depending on the intended use.

People who shoot the GLF AR-15 in .450 Bushmaster mostly come to it from a hunting background, and that shows in what they talk about. The .450 Bushmaster cartridge is the main draw -- it delivers a lot of energy at hunting distances and is legal for deer hunting in straight-wall cartridge states where centerfire rifle options are otherwise restricted. The OD Green finish gets positive comments; it's a practical color choice that doesn't look out of place in the field.

The recoil is a real consideration. Owners are generally upfront that .450 Bushmaster kicks more than most AR owners are used to, and newer shooters note a steeper learning curve getting comfortable with it. The compensator helps but doesn't eliminate the push.

Ammo cost and availability come up in nearly every discussion. .450 Bushmaster is harder to find at local stores than 5.56, and the price per round is higher. Most owners plan ahead and buy in bulk. Build quality feedback is consistently positive -- the rifle feels well-made and reliable, and there aren't many reports of function issues.