The SUB2000 GLK 10mm is a folding semi-automatic carbine chambered in 10mm Auto and compatible with Glock 20 magazines. The Gen 3 platform adds a rotating forend allowing it to fold with optics mounted. It features a 16.15" barrel blowback action M-LOK handguard threaded barrel and adjustable sights. Caliber: 10mm Auto Weight Unloaded: 5.6 lbs Magazine Capacity: Varies by magazine Overall Length: 29.2" Length Folded: 16.15" Barrel Length: 16.15" Trigger Pull: 5 lbs