I’m not that sure about that, let me give you an example. In Poland black powder guns are completely legal and don’t require you to even register them with the police (unlike modern firearms which require you to obtain a permit, pass medical exams etc). So I can now go to a store, buy a black powder revolver, some 10mm lead bullets, black powder, primers and (what is also legal) walk around the city with my revolver on me. Guess what. Since 2009 iirc when that law has been passed only one person has been shot using black powder rifle. One. Your arguments are invalid.
IDK, maybe it’s Britain-related. You guys need check where those knife attacks are coming from, we don’t have a knife-killing pandemic over here.