Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5652592.

Revy's guns, the Berretta 92f Cutlass, from the anime Black Lagoon

The gun should be sized to the size of an actual Berretta 92f. I am in the process of printing so I am not sure if everything fits together perfectly.

Update 12/20: Fixed an issue in the slide where the safety clipped through the bottom an caused problems