You can print the F1 from
www.titleii.com and use that. Be sure to print both sides and do it in duplicate for each weapon you want to register. You'll also need one copy of the US Citizenship form, and two FBI fingerprint cards (ie. five forms plus a check for the transfer/making taxes for each weapon). If you don't have a C3 dealer in your area from whom you can get the fingerprint cards, you may well be better off just calling the NFA Branch at BATF and ordering all the materials.