3 adjectives to describe sniper

On the other hand, in the mind of an impartial student of the facts there cannot be the slightest doubt that at Louvain there was an organized attack on the invaders by snipers and franc-tireurs armed with knives, guns, revolvers of every description.

But, in spite of this, Ted Caught the fever and enlisted. 'Twas our gallant pocket-sniper's Fate to find himself at Wipers,

It was late June at its loveliest; no signs of war except the sound of our guns some distance away and an occasional sniper's bullet.

3 adjectives to describe  sniper