History of gun possession has gone so far in USA it's rooted in your culture. You can't change that overnight with some Congress bill anymore. I could argue NRA is the third biggest political party in USA that holds both GOP & Dems hostage because of its influence. In Poland it's notoriously difficult to obtain a gun permit and air pistols are mostly in use. You must be a lawyer, prosecutor or some hot-shot businessman to obtain a permit for a gun. Hunting rifles are common but semi-automatic guns are basically reserved for organized crime. The biggest "mass shooting" in peacetime Poland occured in 1925 when two students detonated a hand granade in Vilno which killed them, two other students & a teacher. And yeah, that was almost 100 years ago while both perpetrators were mentally unhinged veterans of the Polish-Soviet War of 1920