The Kel-Tec Sub 2000 Gen 2 is a semi-automatic pistol-caliber carbine designed to fold for compact storage and portability. It is chambered in 9mm, and the Gen 2 model specifically accepts Glock magazines. This allows for compatibility with various Glock pistol models and magazines, which is a popular feature among shooters who already own Glock handguns.The Sub 2000 Gen 2 features a polymer frame and a 16.25-inch barrel. It incorporates a simple blowback operating system and has an adjustable stock, which makes it adaptable to different shooter preferences and provides additional length of pull options.It’s worth noting that specifications and features may have been updated or revised since my last knowledge update in September 2021. Therefore, it’s recommended to visit Kel-Tec’s official website or contact them directly for the most accurate and up-to-date information on the Kel-Tec Sub 2000 Gen 2 9mm Glock model.