Manufactured and registered in Portland, Oregon prior to the 1986 cutoff, this Uzi bolt is configured for compatibility with commercial semi-auto receivers, properly slotted on the right side to pass the restrictor block, with serial number and address engraved on top.

Manufactured in Israel and imported by Action Arms of Philadelphia, Pennsylvania as a semi-automatic carbine, this Uzi Model B has been outfitted as a selective fire machine gun via installation of the registered conversion bolt described as Item A. No permanent modification were made to the receiver; the bolt restrictor block and barrel collar are untouched. Post front and two-leaf peep rear sights, with a non-ratcheting top cover, "A F S" marked trigger housing with proper open bolt components, knurled barrel nut, standard receiver markings, a set of ribbed forearm and grip panels, and an underfolding stock.

Threaded to match the barrel currently installed in the host gun (Item B), 12 1/2 inches overall, with alloy and steel construction, internally configured with a ported expansion chamber and baffle stack. With an insulated cover.