`(D) A semiautomatic rifle that has an ability to accept a detachable magazine, and that has--
`(iii) a pistol grip;
`(v) a barrel shroud.
(`(36) BARREL SHROUD- The term `barrel shroud' 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, but does not include a slide that encloses the barrel, and does not include an extension of the stock along the bottom of the barrel which does not encircle or substantially encircle the barrel.)
(`(38) DETACHABLE MAGAZINE- The term `detachable magazine' means an ammunition feeding device that can readily be inserted into a firearm.)
`(42) PISTOL GRIP- The term `pistol grip' means a grip, a thumbhole stock, or any other characteristic that can function as a grip.