Tf 2 Lvl 3 Sentry for People Playground

Red Lvl 3 sentry from Team Fortress 2 (no mods required!)

has a range of 20 meters
dont make the targets walk too close, sentry doesnt like explosions

controls: (the turret shoots automatically but needs to be aimed manually,might do fully automatic version in the future)
U-elevate guns
J-Depress Guns