Questions about example sentences with, and the definition and usage of "Sniper"

A: A sniper is a person who shoots a gun from a long distance away, usually in spy movies

A: A person who is good at using a rifle, usually they shoot specific targets while hidden.

The story I heard is that it comes from people who hunted the "snipe" (which was supposedly a small bird that was very fast and easily spooked).

A: A team of professional riflemen trained to kill with rifles at long distances

A: You look like a sniper.

A: Check the question to view the answer

A: I had to look up that word, however.

Maybe use effective (use an instead of a), efficient, or expert so describe that the sniper is good at what he does.