From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
gats /ɡˈats/
Knarren <pl>, Kanonen <pl>, Schießeisen <pl>, Ballermänner <pl>, Schießprügel <pl>, Bleispritzen <pl>, Knallbüchsen <pl>, Donnerbüchsen <pl>
Synonyms: shooters, shooting irons, rods
see: shooter, shooting iron, gat, rod