ATI GSG-9 9mm Luger 10+1 7.9" Threaded Barrel, M-LOK Handguard The new GSG-9 pistol from ATI is a modernized and capable pistol caliber carbine that can easily be used for home defense, plinking, or a compact 9mm for fun at the range. It features a 7.5" barrel, an M-LOK handguard for attaching lights or lasers, and comes with an adapter that allows it to accept Sig P320 and Glock 9mm magazines. American Tactical and GSG are excited to bring to the United States the very first reproduction of the original WWII MP-9 in 9mm. Manufactured as a pistol with no stock, this replica classic firearm is the closest version of an MP-9 to be importable in decades! While maintaining a close overall appearance to the original WWII firearm, the GSG-9 is manufactured with all new parts to US regulation specs for importation. The ATI GSG-9 accepts Sig P320 and Glock double stack 9mm factory magazines up to 33 rounds. GSG-9 other features include an ambidextrous charging handle and controls, adjustable trigger, precision hammer forged barrel, and an adapter for Glock 9mm and Sig P320 mags.