Here is one I am seriously thinking about purchasing. I sot one of these over ther week end and I am telling you this is a damn nice pice of handgun artillery.
"You say the Devil made do it with a smile. Raisin' hell and howlin at the moon. Well I'm gonna put your @$$ back in line. I'm gonna scare the Devil out of you."
BlackBerry Smoke Song http://www.youtube.com/watch?v=R513dA4peMg
Nothing is "proof" against a truly talented fool.
About 45-50 years ago some chaps over here used one of your Boyes(?) .55 cal. anti-tank rifles to blast their way into a money vault of a large armored car company (Brinks).
Soon after the USA made anything bigger than 0.50" rifled bore size a "Destructive Device" by definition. In more recent years this rule has been relaxed to allow rifled barrel shotguns and other sporting arms.
I do not keep up with the fine points of USA law (NFA) on anti-tank rifles, but suspect that these are still regulated here.