The Great Lakes Firearms AR-15 in .450 Bushmaster is a semi-automatic rifle with an 18-inch stainless steel barrel and a white finish. It holds 5 rounds, has a 15-inch free-float M-LOK handguard, and a collapsible stock. The synthetic stock pairs with the white and black hardware. 
 

Key Specifications 

• Brand: Great Lakes Firearms 
• Model: AR-15 
• Caliber: .450 Bushmaster 
• Action: Semi Auto 
• Barrel Length: 18" 
• Capacity: 5 
• Color/Finish: White 
   

Detailed Features 

• 18-inch stainless steel barrel in white finish 
• 15-inch free-float M-LOK handguard 
• Collapsible stock 
• 5-round magazine 
• Synthetic stock with white and black hardware

Owners of the Great Lakes Firearms AR-15 in .450 Bushmaster point to the stainless barrel and white finish as the standout visual combination. The free-float M-LOK handguard is consistently appreciated because it keeps the option open for accessories without adding weight from the factory.

Recoil and cycling with .450 Bushmaster generate the most discussion. The 18-inch barrel helps extract more velocity from the large-bore cartridge, and most owners report reliable feeding with quality factory ammunition. A smaller number note that handloads or budget brass can cause occasional feeding issues, which is common feedback across AR-platform large-bore builds.

Value sentiment on the Great Lakes AR-15 .450 Bushmaster is generally positive for buyers who want an AR-pattern large-bore without reaching for a premium price tier. Some owners note that the white finish requires more maintenance to keep looking clean, and a few find the 5-round capacity limiting for extended range sessions, though it matches the caliber's typical magazine constraints.