(a) Explosives means gun powders, dynamite, blasting powder, all forms of high explosives, initiating or priming explosives, blasting caps, ammunition for cannon, explosive projectiles, bombs, torpedoes, mines, grenades, detonating fuses or any other such chemical compounds, mechanical mixtures or devices which may be designated by regulation as materials which the protection of life and property requires to be considered as explosives.
(b) The term explosives does not include small arms ammunition designed for use in firearms which are entitled to registration pursuant to Chapter 60 of this Title.
SOURCE: GC § 8925.