You will have to define the term "Sniper rifle". It could mean anything. The only TRUE sniper rifle is a rifle issued to a sniper. They are simply rifles that are capable of long range accurate shooting. The rifles used by US Military snipers during the Vietnam was were simply civilian hunting rifles with decent telescopes.
Depends on where you are.
No
for a rifle it is thought to be a .50 calibre but a gun company made there own for there own sniper rifle the .408 calibre
Well, that depends on the laws where you live. In most of the US, they're perfectly legal, with the one exception being California. In other countries, the laws are much different.
You need to tell us which rifle. Chances are that there is some legal way to own it.
Only if you have the relevant BRITISH license. =]
no it is not legal to keep any wolf/wolfdog of any kind in kentucky.
Yes
no if he has a permit
Depends on the laws where you live.
Laws on this vary by country.
Yes- air weapons are amongst the few firearms it remains legal for a private individual to own in the UK.