I don't think an intro is the most necessary thing for this guy considering he only wants to make a paper sniper rifle.fuzzywolly said:Welcome to the forum, please make an intro post in the appropriate section as well as working on the grammar and punctuation.
If you are making it out of paper does accuracy really matter that much. I am sure with a bit of googling you could get the dimensions of the real thing.
Also why not use a toy sniper rifle. I'm sure you could get one.