I want to make a 410 caliber pump action pistol. Since I live in the USA, the only way to do this without going the NFA route and getting ATF permmission is to start with a 410 shotgun equipped with a pistol grip from the factory. I also have to equip it with a rifled barrel to avoid the NFA AOW catagory. Is there a simple way to cut shallow rifling grooves into a smooth bore shotgun barrel? The grooves do not have to be deep, or even very good, just there. I have a lathe. I will be shooting 1.25" shells in the pistol. Thanks.
Ranb
Ranb