sharpshooter (n.)

• archer
• artilleryman
• bowman
• cannoneer
• carabineer
• deadeye
• footslogger
• grenadier
• grunt
• gun
• gunman
• gunner
• hunter
• infantryman
• marksman
• musketeer
• rifle
• rifleman
• shooter
• shot
• sniper
• trapshooter