16. "Assault weapon."
(a) Any semiautomatic centerfire or rimfire rifle or semiautomatic shotgun which has one or more of the following features:
1. folding or telescoping stock or no stock;
2. pistol grip that protrudes conspicuously beneath the action of the weapon;
3. bayonet mount;
4. flash suppressor or threaded barrel designed to accommodate a flash suppressor;
5. barrel shroud;
6. grenade launcher; or
7. modifications of such features, or other features, determined by rule of the commissioner to be particularly suitable for military and not sporting purposes. In addition, the commissioner shall, by rule, designate specific semiautomatic centerfire or rimfire rifles or semiautomatic shotguns, identified by make, model and/or manufacturer's name, as within the definition of assault weapon, if the commissioner determines that such weapons are particularly suitable for military and not sporting purposes.
(b) Any shotgun with a revolving-cylinder magazine.
(c) Any part, or combination of parts, designed or redesigned or intended to readily convert a rifle or shotgun into an assault weapon.
(d) "Assault weapon" shall not include any rifle or shotgun modified to render it permanently inoperative.