I found this in a box while tidying up my retro collection, despite looking like an Atari compatible joystick, this is acually for the Sega Megadrive
Three fire buttons for A, B, and C, plus the Start button, and a handy Autofire switch. I would imagine the trigger button is mapped as A, and B and C are on the top
Side profile, base and close-up of the model number
?DIVISION BY ZERO ERROR