That depends on the game laws where you live. In the US, each state has their own fish and game laws, and they vary from state to state. Check the game laws in your state.
A "sniper rifle" is simply a rifle employed for that purpose. So long as the "sniper rifle" meets the criteria and restrictions for hunting firearms in the state you're hunting in, you can use it.
Depends on the laws where you live.
rifles are used for war and legal hunting. I want to use it for shooting "cans".
Yes- see link at bottom of page.
If you can legally own a suppressor, you can just as legally mount it on a hunting/sporting rifle - however, you can't do this when you're actually hunting with those firearms.
You will have to define "sniper rifle". There is no meaning to that term, other than an accurate scope mounted rifle. That includes most hunting rifles.
18 for a shotgun/hunting rifle, and 21 for a handgun.
No you need pretty serious permits just for a hunting rifle. No automatic fire arm is legal in Canada
Yes, it is a superb hunting rifle, more advanced and fast than the average bolt action rifle. However, you need to check the local hunting regulations on how many rounds are legal in a weapon while hunting, in some places its 5 rounds in others, its 10.
It depends on the gun and caliber but most semi-automatic rifles such as the Ruger .22 are legal to hunt with in California.
You will need the services of a lawyer for a correct, legal and current answer.
South Dakota defines legal firearms in terms of muzzle energy, not caliber. See the link below.