I'd like a little clarification... If a shotgun was made prior to say 1893 it would be considered a blackpowder shotgun due to the fact that smokless powders weren't invented yet. Blackpowder guns are not subject to the same rules as modern firearms so how is it that an 1893 shotgun with 16" barrels would be considered in violation of NFA rules? You can own a smoothbore black powder pistol with 8" barrel - what's the difference? Is it only muzzleloader vs. breechloader? How can on one hand anything made prior to 1899 be considered an antique and not a gun, yet on the other hand be subject to the national FIREARMS act. Like most things the government is involved with.... very confusing.