Rifle hunting can include many types of rifles or differing calipers. Many hunting rifles are long range rifles which allow hunters to shoot game at great distances. Hunting rifles are generally high velocity rifles with a lower caliber than they had been in the past. They are also now constructed of materials that allow the rifles to be lighter, which makes them easier to carry into the woods. In addition, the lower weight makes the guns more easily maneuvered. Some rifle hunting involves weapons that have add ons, such as telescopic sights. Although sights are usually associated with sniper rifles, hunters sometimes need to be a great distance form the game, in order to avoid scaring it away. The scopes allow hunters to watch their game, while ensuring accuracy when they fire the weapon. The type of weapons which are allowed to be purchased in each state, are governed by federal and local laws. In addition, hunting riffles may only be permitted if they fit certain specifications. For example, hunters may only be allowed to use certain caliber of weapon. In fact, they may only be allowed to use a specific caliber for certain game. Some states may only allow factory improvements on hunting rifles. For example, they may not allow individuals to add their own improvements, such as scopes, unless they fit factory specification. The laws on hunting rifles will vary in each state and hunters must also comply with federal rifle hunting laws.