; (IV) a grenade launcher; (V) a barrel shroud; or (VI) a threaded barrel; (B) a semiautomatic rifle that has a fixed magazine with the capacity to accept more than 10 rounds, except for an attached tubular device designed to accept, and capable of operating only with, .22 caliber rimfire ammunition; (C) any part, combination of parts, component, device, attachment, or accessory that is designed or functions to accelerate the rate of fire of a semiautomatic firearm but not convert the semiautomatic firearm into a machinegun; (D) a semiautomatic shotgun that— (i) has the capacity to utilize a magazine that is not a fixed magazine; and (ii) does have any one of— (I) a folding, telescoping, or detachable stock; (II) a pistol grip or bird's head grip; (III) a fixed magazine with the capacity to accept more than 5 rounds; (IV) the ability to accept a detachable magazine; (V) a forward grip; or (VI) a grenade launcher; (E) any AK or AR type of weapon, including a rifle, copy, duplicate, variant, or altered facsimile with the capability of any such weapon; or (F) any weapon that is substantially similar to a weapon described in subparagraphs (A) through (E) determined by the Attorney General pursuant to a rule, which shall be made on the record after opportunity for a hearing pursuant to the rulemaking procedures prescribed by subchapter II of chapter 5 of title 5