Sometimes our (US) laws can be a bit illogical. If I'm not mistaken, I believe the particular nuance of "U.S. Made" guns versus "foreign" guns was driven by heavy lobbying from our American gun manufacturers and supported by some "more aggressive" foreign guns coming from overseas, at the time the law was pushed through. I'm thinking of guns like the UZI and AKs. At the time, the U.S. manufacturers were not producing such "nice" weapons.
The results of these laws has resulted in what you see today. It's more of a hinderance than anything. I don't mind dropping some American parts on the gun to comply with our laws. And specifically in this case, I think most of these parts are superior to the original production anyway. The one I'd agree is not necessarily better is the forward cover/grip (what ever you call it on a automatic shotgun.)
At least we live in a country that supports guns in the hands of it's citizens. There are plenty of european countries, as well as asian countries where this is not the case.
On a personal level, I support gun ownership, but I would like to see required training classes to be permitted to obtain a gun owners permit. I know that is onerous, but there are allot of people out there that do not know how to handle a gun, but often have them lying around their home or carrying them with them. At the moment, I'm thinking of the Arizona senator who, in play, pointed her concealed carry gun at a reporter and "lit up" the laser sight on the reported. She later said, that while the gun had no safety, it was perfectly safe to point a loaded gun at another person, because she didn't have her finger on the trigger. That's not how I was ever taught to handle a gun and I suspect most of us know you don't point a weapon at a person unless you intend to shoot it. I recall a recent vide president that accidentally shot someone. It's a real simple rule. First and foremost, don't allow the gun to be pointed where you don't want to shoot, regardless if your finger is on the trigger, the safety is on or you don't think the gun is loaded. I could go on and on, but if our representatives don't have that basic common sense, I think it's reasonable that we require a little training for the safety of all. And with less accidental shootings, then perhaps we can loosen up on our concealed carry concerns and other gun controls.