The GLFA AR-15 in .450 Bushmaster is a semi-automatic rifle built by Great Lakes Firearms and Ammunition on a 7075 aluminum frame. The 18-inch barrel and white Cerakote finish are the defining characteristics at a glance; the .450 Bushmaster chambering is what makes it useful for medium to large game in states that require straight-wall cartridges. 
 

Key Specifications: 

• Model: AR-15 
• Caliber: .450 Bushmaster 
• Barrel Length: 18 inches 
• Overall Length: 35 inches 
• Weight: 6.4 lbs 
• Capacity: 5 rounds (1 magazine included) 
• Action Type: Semi-Automatic 
• Frame Material: Aluminum 7075 
• Finish Color: White Cerakote 
   

Features: 

 
The 18-inch barrel has a 1:24 twist rate, which is standard for .450 Bushmaster and keeps the heavy, slow projectiles stable. The mid-length gas system uses a .750 gas block and runs the gas tube at a geometry that softens the recoil impulse and keeps cycling reliable. A forward-angled muzzle brake (6 degrees) is included and reduces muzzle rise without needing tools to install. The mil-spec polymer grip and oversized upper receiver keep weight at 6.4 lbs — light for the caliber.

The white Cerakote finish gets the most immediate attention in reviews — it distinguishes the rifle from the standard black AR market and gets consistent positive remarks. The .450 Bushmaster caliber draws hunters in straight-wall-cartridge states, who generally report it handles larger game well with recoil that's more manageable than they expected from a rifle of this size.

Reliability and accuracy get solid ratings in most reviews. Occasional feeding issues with certain ammunition types come up in community discussions, which is common with .450 Bushmaster builds given the cartridge's geometry. Weight and bulk draw some criticism from users comparing it to lighter AR-15 configurations.

On value, opinions are split. Some buyers think the price is fair given the finish quality and caliber capability; others compare it against alternative .450 Bushmaster platforms and find the gap narrow enough to question. Overall, the feedback reflects a rifle that does what it claims — the discussion is mostly around whether those specifics match the buyer's use case.