To turn that USC into a 9mm UMP, you must perform a caliber and furniture conversion. H&K USC: Civilian Version of the UMP Submachine Gun
Instead, enthusiasts follow a well-traveled path of converting a legal civilian carbine into a faithful UMP clone. 1. The Foundation: The HK USC buy ump 9mm
: You can find these at major retailers like Palmetto State Armory or on secondary markets like GunBroker . 2. The Transformation: Conversion Kits To turn that USC into a 9mm UMP,
To turn that USC into a 9mm UMP, you must perform a caliber and furniture conversion. H&K USC: Civilian Version of the UMP Submachine Gun
Instead, enthusiasts follow a well-traveled path of converting a legal civilian carbine into a faithful UMP clone. 1. The Foundation: The HK USC
: You can find these at major retailers like Palmetto State Armory or on secondary markets like GunBroker . 2. The Transformation: Conversion Kits