As used in this part:
(1) "Firearm" means a device from which is expelled a projectile by action of an explosive.
(2) "Firearm accessory" means an item that is used in conjunction with or mounted upon a firearm, firearm action, or firearm receiver but is not essential to the basic function of a firearm, including:
(a) a telescopic or laser sight;
(b) a magazine;
(c) a flash or sound suppressor;
(d) a folding or aftermarket stock or grip;
(e) a speed-loader;
(f) an ammunition carrier; and
(g) a light for target illumination.
(3) "Generic and insignificant parts:"
(a) means parts that have other manufacturing or consumer product applications; and
(b) includes:
(i) springs;
(ii) screws;
(iii) nuts; and
(iv) pins.
(4) "Manufactured" means creating a firearm, a firearm action or receiver, a firearm accessory, or ammunition from basic materials for functional usefulness, including:
(a) forging;
(b) casting;
(c) machining; and
(d) another process for working materials.