A "firearm related item" means any of the following:
(a) ammunition;
(b) a silencer;
(c) an item that is designed as, or reasonably capable of forming, part of a firearm;
(d) any other item prescribed by regulation.
Examples for paragraph (c)
A barrel, breech block, pistol slide, frame, receiver, cylinder, trigger mechanism, bolt, stock, grip, operating mechanism or magazine.