Partially tradition, partially law, partially geography. Tradition- America is a young nation compared to many, and has a tradition of expansion and settlement in frontier areas, where guns were needed for protection and hunting. Law- because the Constitution recognizes that people have the right to possess guns. Geography- because the US is a big country, much of it still being rural, with open spaces,
see the link below for the air gun law in the UK
See the link below for a list of UK air gun laws.
All you have to do is pull a trigger, so it is very easy, almost effortless, to shoot a paintball gun.
yes
In US - no. In UK - yes. In Australia - yes.
It's possible, but firearms ownership is very restrictive in the UK.
Depends on what you mean by "easy".
you dont
Its a very good basic gun. It gets good stock ranges, has a scope, is about $20 in America and is easy to modify and paint. I would buy it if I didn't live in UK.
probaly
No, you must leave the origional bright colors on the gun.
Not easy. You can buy one for what it would cost to try this.