Ok then, back to a good discussion.
Well I am not American either I am Canadian. I have seen the Jim Jefferies comedy skit on gun control and thought he was a twit after it. Next is the perception you seem to have of American gun laws. It is wrong mostly, the most commonly referred to AR-15 as a assault rifle is wrong. Going by the definition of an assault rifle "An
assault rifle is a
selective-fire rifle that uses an
intermediate cartridge and a
detachable magazine." most of the rifles that are called assault rifles do not contain selective fire (full auto or burst fire), they are a sporting rifle so semi auto. Yes some people in the US can own an actual assault rifle but they are few and far between, and from what my research has shown mostly firearms business owners. It is really expensive to legally own a full auto, like $20,000 kinda expensive, and that does not include the mass amount of ammo one of these would go through (like $15 a minute haha).
Most of these "assault rifles", are actually less powerful then your average hunting rifle and would be relegated to hog or coyote hunting. An AR-15 uses a 5.56x45 or .223 round. This is pretty much just a really suped up .22 rimfire round haha. I don't know about you but the smallest rifles I see in normal use are in the .30 cal range (.308, 300 win mag, 7mm) now an AK-47 would use a similar round as the 7.62 x 39 is in the .30 cal family but is still smaller than your average hunting round (I would go for deer but not moose with it). So now we have a semi-auto sporting rifle that is either a really suped up .22 in center fire, or a semi-auto sporting rifle that has a small hunting round in it.
Now these sporting rifles are called "assault weapons" now in the main stream media in North America since firearms owners kept getting pissed off at the assault rifle thing and we easily made the media look like idiots because of it. The "assault weapon" pretty much refers to a rifle with pistol grip and removable mags in semi-auto. So wanting to have a more ergonomically correct rifle that's action is no different then a hunting rifle (plenty of semi-auto hunting rifles) and fires a smaller round then most hunting rifles. Sorry but the "firepower" that you refer to does not exist. Also these rifles are responsible for like 2-4% of US gun crime, its mostly handguns.
And yes bear spray is exactly what you think, pepper spray for bears, and it seems like a dumbass idea to me too.
As for the US laws, what happens is (and this mostly happens at the federal level from what I understand) they put in for the record check at purchase time, the local authorities respond in the 3 days they have, the state level usually respond in the 3 days, then for the FBI, they get it, it sits in a pile, they open it up and see the date and throw it out as its been 10 days and the guy has already picked up and left the store with the rifle as they only have 3 days to respond.