; and (B) does not include an attached tubular device designed to accept, and be capable of operating only with, .22 caliber rimfire ammunition. (38) The term barrel shroud — (A) means a shroud that is attached to, or partially or completely encircles, the barrel of a firearm so that the shroud protects the user of the firearm from heat generated by the barrel; and (B) does not include— (i) a slide that partially or completely encloses the barrel