In this chapter:
(1) “Firearm” has the meaning assigned by Section 46.01, Penal Code.
(2) “Firearm suppressor” means any device designed, made, or adapted to muffle the report of a firearm.
(3) “Generic and insignificant part” means an item that has manufacturing or consumer product applications other than inclusion in a firearm suppressor. The term includes a spring, screw, nut, and pin.
(4) “Manufacture” includes forging, casting, machining, or another process for working a material.