Interdynamic MP-9
Encyclopedia
The Interdynamic MP-9 is a blowback
-operated, fully automatic 9 mm caliber firearm
, classified by BATF as a machine gun
. It is made of inexpensive molded polymer
and stamped steel parts. 10, 20, 32, 36 and 50 round magazines are available.
The MP-9 came from a design that a Swedish company Interdynamic AB of Stockholm
had for a cheap submachine gun for military applications. Interdynamic was unable to drum up any interest among governments, and the subgun never entered production in Sweden. Unwilling to give up on the design, Interdynamic set up a U.S. subsidiary intended principally to market a semiautomatic version, named the KG-9 after the two principal partners Kelgren & Garcia, to civilians. More about Kelgren and Garcia can be found under Intratec TEC-DC9
.
Interdynamic U.S.A. was forced by the BATF to redesign the KG-9 due to its ease of being converted to full auto. At the same time as a closed bolt being designed, per the BATF, the lower plastic receiver had to be retooled to place a metal serial number tag in the side as opposed to just stamping the serial number in the plastic magwell. This version was named the KG-99 and it is this gun that was offered in an open bolt submachine gun configuration designated the MP-9. Placed side by side, the KG-99 and MP-9 upper and lower receivers are identical with the exception that the MP-9 has a bolt hold open slot milled in the upper and the tip of the muzzle has a compensation slot cut into it. Interdynamic produced a very small quantity of registered MP-9 submachine guns due to lack of demand by the general public. The MP-9 was made in two configurations, one with select fire capability and a collapsible stock, and one that is fully automatic only with no stock. Production numbers are believed to be less than 50 total, perhaps as few as 24 in select-fire with the collapsible stock. More information on this type of gun can be found here under Intratec TEC-DC9
.
Blowback (arms)
Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gases created by the ignition of the propellant charge....
-operated, fully automatic 9 mm caliber firearm
Firearm
A firearm is a weapon that launches one, or many, projectile at high velocity through confined burning of a propellant. This subsonic burning process is technically known as deflagration, as opposed to supersonic combustion known as a detonation. In older firearms, the propellant was typically...
, classified by BATF as a machine gun
Machine gun
A machine gun is a fully automatic mounted or portable firearm, usually designed to fire rounds in quick succession from an ammunition belt or large-capacity magazine, typically at a rate of several hundred rounds per minute....
. It is made of inexpensive molded polymer
Polymer
A polymer is a large molecule composed of repeating structural units. These subunits are typically connected by covalent chemical bonds...
and stamped steel parts. 10, 20, 32, 36 and 50 round magazines are available.
The MP-9 came from a design that a Swedish company Interdynamic AB of Stockholm
Stockholm
Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...
had for a cheap submachine gun for military applications. Interdynamic was unable to drum up any interest among governments, and the subgun never entered production in Sweden. Unwilling to give up on the design, Interdynamic set up a U.S. subsidiary intended principally to market a semiautomatic version, named the KG-9 after the two principal partners Kelgren & Garcia, to civilians. More about Kelgren and Garcia can be found under Intratec TEC-DC9
Intratec TEC-DC9
The Intratec TEC-DC9 is a blowback-operated, semi-automatic firearm, chambered in 9×19mm Parabellum, and classified by the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives as a handgun. Designed by Intratec, an American offshoot of Interdynamic AB, it is made of inexpensive molded polymers...
.
Interdynamic U.S.A. was forced by the BATF to redesign the KG-9 due to its ease of being converted to full auto. At the same time as a closed bolt being designed, per the BATF, the lower plastic receiver had to be retooled to place a metal serial number tag in the side as opposed to just stamping the serial number in the plastic magwell. This version was named the KG-99 and it is this gun that was offered in an open bolt submachine gun configuration designated the MP-9. Placed side by side, the KG-99 and MP-9 upper and lower receivers are identical with the exception that the MP-9 has a bolt hold open slot milled in the upper and the tip of the muzzle has a compensation slot cut into it. Interdynamic produced a very small quantity of registered MP-9 submachine guns due to lack of demand by the general public. The MP-9 was made in two configurations, one with select fire capability and a collapsible stock, and one that is fully automatic only with no stock. Production numbers are believed to be less than 50 total, perhaps as few as 24 in select-fire with the collapsible stock. More information on this type of gun can be found here under Intratec TEC-DC9
Intratec TEC-DC9
The Intratec TEC-DC9 is a blowback-operated, semi-automatic firearm, chambered in 9×19mm Parabellum, and classified by the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives as a handgun. Designed by Intratec, an American offshoot of Interdynamic AB, it is made of inexpensive molded polymers...
.