The GLFA AR-15 in .450 Bushmaster is a semi-automatic rifle built by Great Lakes Firearms and Ammunition. It has a Pursuit Green Camo Cerakote finish on a 7075 aluminum receiver with an 18-inch 4150 CRMOV Nitride barrel. 
 

Key Specifications 

• Model: AR-15 
• Caliber: .450 Bushmaster 
• Action: Semi-Automatic 
• Barrel Length: 18 inches 
• Overall Length: 35 inches 
• Weight: 6.4 lbs 
• Capacity: 5 rounds (1 magazine included) 
• Finish: Pursuit Green Camo Cerakote 
• Frame Material: Aluminum 7075 
• Gas System: Mid-Length Gas Tube with a 0.750 Gas Block 
   

Detailed Features 

The 18-inch barrel has a 1:24 twist rate suited to the .450 Bushmaster's heavy projectiles. The mid-length gas system reduces dwell time compared to a carbine-length setup, which smooths cycling and softens the felt impulse. The included muzzle brake redirects recoil forward at a six-degree angle and installs without Loctite. The mil-spec polymer grip and full-length Picatinny rail on the handguard accept standard AR accessories without modification. 
 

Usage Scenarios 

The .450 Bushmaster caliber is well-matched to deer and bear hunting, particularly in states with straight-wall cartridge restrictions. The 6.4 lb. weight and 35-inch overall length are manageable in the field. At the range, the semi-auto action allows quick follow-up shots, though the 5-round magazine capacity reflects the cartridge's size. The Cerakote finish holds up to weather and handling better than standard bluing.

Owners of the GLFA AR-15 in .450 Bushmaster generally like what they get, with a few recurring qualifications.

Performance is the top talking point. Users hunting large game report good results, and the rifle's handling of the .450 Bushmaster cartridge draws consistent praise for reliability. Build quality is seen as solid — the 7075 aluminum receiver and Cerakote finish both hold up to regular use. The Pursuit Green finish is a frequent positive mention; it stands out from the typical black AR and suits field use.

Recoil comes up often. Most experienced shooters describe it as manageable, but newer shooters note an adjustment period. Customization gets discussed frequently, since the AR-15 platform accepts a wide range of aftermarket components.

The two persistent criticisms are price and parts availability. Opinions on value are split — some find it fairly priced given the build quality, others think similar rifles can be had cheaper. Accessories and replacement parts specific to the .450 Bushmaster configuration are harder to source than standard 5.56 components, which is a practical concern for long-term ownership.