The Great Lakes Firearms GL15 is a semi-automatic AR-pattern rifle chambered in .400 Legend with a 16-inch threaded stainless steel barrel. It has a 5-round capacity, M-LOK handguard, and a 6-position black synthetic stock with black Cerakote finish. 
 

Key Specifications 

• Brand: Great Lakes Firearms 
• Model: GL15 (GL15400SS) 
• Caliber: .400 Legend 
• Action: Semi Auto 
• Barrel Length: 16" 
• Capacity: 5+1 
• Color/Finish: Black Cerakote 
   

Detailed Features 

• 16-inch threaded stainless steel barrel 
• M-LOK handguard for accessory attachment 
• 6-position adjustable black synthetic stock 
• 5+1 round capacity in .400 Legend

Owners of the Great Lakes Firearms GL15 in .400 Legend often pick it up as an entry point into the .400 Legend cartridge on a familiar AR-pattern platform. The M-LOK handguard and 6-position stock get straightforward praise for usability, and most find the stainless threaded barrel an asset for suppressor mounting.

The GL15 trigger is a common discussion point. It functions reliably but many owners swap it early for something with a cleaner break. Build quality for the price range is generally regarded as acceptable rather than exceptional.

Magazine availability for .400 Legend comes up regularly in owner discussions. Those who plan ahead stock up early; a few report frustration sourcing spares at local shops. The black Cerakote finish holds up well in routine use according to most long-term owners.