; or (D) and inserting or (C) ; and (2) by striking paragraph (24). (b) Penalties Section 924 of title 18, United States Code, is amended— (1) in subsection (c)(1)— (A) in subparagraph (B)(ii) by striking ‘‘, or is equipped with a firearm silencer or firearm muffler’’; and (B) in subparagraph (C), by striking ‘‘or is equipped with a firearm silencer or firearm muffler,’’; and (2) in subsection (o), by striking or is equipped with a firearm silencer or muffler, . (c) Carrying of concealed firearms by qualified law enforcement officers Section 926B(e)(3) of title 18, United States Code, is amended— (1) in subparagraph (A), by adding and at the end; (2) by striking subparagraph (B); and (3) by redesignating subparagraph (C) as subparagraph (B). (d) Carrying of concealed firearms by qualified retired law enforcement officers Section 926C(e)(1)(C) of title 18, United States Code, is amended— (1) in clause (i) by adding and at the end; (2) by striking clause (ii); and (3) by redesignating clause (iii) as clause (ii).