IMI Uzi 9mm Registered Receiver Machine gun This is a registered receiver IMI Uzi in 9mm.  It does not have the slot in the receiver so you can use any caliber conversion kit.  

IMI Uzi Registered Receiver  This is a registered receiver Uzi.  This originally started life as a Model B that was convereted back in 1986 to a true SMG(no side rails)    

IMI Uzi Registered Receiver 9mm This is a registered receiver IMI Uzi in 9mm.  It does not have a slotted bolt so you can use whatever conversion kits you want.  It also has an awesome...

IMI Uzi Model B Machine Gun This is a registered receiver Uzi, starting life out as a model B back in the 1980's.  Since this is a registered receiver, you can use all the caliber conversion...