High capacity 100 round drum magazine in 9mm caliber for all double stack Glock 9mm pistols. If you own a Glock 9mm pistol get one of these while you can. This high quality 100 round drum mag is made in South Korea to Mil specs. That means they work. Locks up tight and feeds flawlessly in all double stack Glock 9mm pistols from the sub-compact version the the full size. SKU ACC-RWB-9MM-100DRUM