Yes. National Firearms Act weapons (which include machineguns, short-barreled rifles and shotguns, and silencers); nonsporting firearms; U.S. government origin firearms or firearms that contain U.S. government origin manufactured parts or components; and firearms from certain proscribed countries may not be temporarily imported.
If you think the firearm(s) you wish to import may be affected by these restrictions, please contact the Firearms and Explosives Imports Branch by phone at (304) 616-4550 or by email at firstname.lastname@example.org.
[18 U.S.C. 922(l) and 925(d); 26 U.S.C. 5844; 27 CFR 447.52 and 447.57; 27 CFR 478.111; 27 CFR 479.111]