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.  

Vector Arms Registered Receiver Uzi 9mm  

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...