The Ruger MP9 introduced by Sturm, Ruger in 1995 is a 9mm submachine gun/machine pistol.
The sub machine gun was created by Uziel Gal of Uzi fame in the early 1980s. The MP9 is very similar to the Uzi, utilizing a telescoping bolt, but fires from a unique closed bolt. The weapon also has a barrel that is quickly detachable that is loaded with a spring to easily cushion the impact of the bolt on closure. The cocking handle of the weapon is located at the top of the receiver. The sub machine gun also has a integrated and substantial folding stock. The weapon was made in very limited numbers. The Ruger MP9 submachine gun was designed and developed for law enforcement forces as a compact weapon. In 1995, the Ruger MP9 was released for military sales and police in the United States. The sub machine gun features three positions fire / safety selector with "semi-auto", "safe" and "full-auto" positions, as well as a separate and distinct firing pin block to increase safety. The MP9 has often been referred to as an improved Uzi.