sniper

(by extension) A sniper rifle

The British, having cleared the open field, now faced the problem of advancing through the trees into the sniper fire of several hundred Virginia militia.

No winnable seat has been found for Mr. H. L. Nathan, a powerful recruit from the Liberal ranks, and poor Mr. Wedgwood Benn, an invaluable sniper for a party in Opposition, has been out of Parliament now since 1931.

Alexander Ovechkin is often regarded as the greatest sniper of his generation.

The real reason most snipers bid late in the auction is that they feel it helps them obtain bargains at the expense of novices who don't understand how proxy bidding works and who place bids for less than the amount they are really willing to pay.