Here's a link to the History.
http://www.nfa.ca/content/view/103/197/Next as to the 1st video, Michael, was that Mickey Fowler?? Sure looks like him, and he does handle the pistol well, just not the cocking part.
Ksail, look up the LAR Grizzly .45 winchester magnum, it does work and can be carried, too much power for street use. Out in the woods or the wilds, it would be very good. Now I have some experience with this caliber and the 1911 grip really does not help with this much recoil. I have also shot a .308 Winchester conversion from Pachmeyer on a 1911 frame, same deal, you will not shoot these very much at one time. My ex boss had a grizzly and took me to the range basically so I could shoot a 100 rounds through it with factory 230 grain ammo, so he could download the empties. My wrists ached for 2 weeks.