SUB Rifle 2000 is a self loading carbine for pistol cartridges. Different versions of the SUB-2000 will accept most modern handgun magazines, e.g. S&W, Glock, Keltec, Sig or Beretta. By rotating the barrel upwards and back, the SUB-2000 can be reduced to a size of 16"x7" to facilitate secure storage. The SUB-2000 also features an internal keyed deployment lock.