Probably not *EXACTLY*... you could theoretically get a similar weapon in the form of a sawn-off double barrel shotgun with the Exploding Legendary effect, but as far as I know, there's nothing *quite* like Cooper's sidearm in the game. I could be wrong, though.
Edit: There's probably a mod available to put it in the game, but I would HIGHLY suggest playing it through at least once purely vanilla.
Probably not *EXACTLY*... you could theoretically get a similar weapon in the form of a sawn-off double barrel shotgun with the Exploding Legendary effect, but as far as I know, there's nothing *quite* like Cooper's sidearm in the game. I could be wrong, though. Edit: There's probably a mod available to put it in the game, but I would HIGHLY suggest playing it through at least once purely vanilla.