Utah Code § 53-5a-401: Definitions.

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.