To elaborate on Paladin's answer a little, it is a Dardick 1500. The green trounds (triangle + rounds) are plastic cartridges with primers, powder and a 38-caliber bullet. They are loaded into the grip as if it were a magazine, after which you close the flap and the rounds feed into a 3-chamber cylinder. They are ejected on the other side after firing by pulling the trigger to load the subsequent tround.
My ugly gun, an early 1920 Mann-Werk 7.65 (.32) automatic from Germany. It was given to me by a close friend about 40 years ago. I'm sure it would work if loaded up and tried out. I'm not going to though. If this gun could only talk, I'm sure it would have interesting tales to tell.
Here's my contribution. A Sears-Roebuck 12 gauge pump, with a home grown camo job that I put on with a couple of rattle cans of some stuff called "Bow-Dull."
And that is some tough stuff. When the picture was taken, the paint job had been on for 25-30 years or so.
It was actually uglier. I had put a sling on by drilling the stock for a conventional sling swivel, and using a radiator hose clamp to hold it on at the front of the magazine. I then wrapped electrical tape around the hose clamp to hide the shiny hose clamp. Redneck engineering at it's best.
But with Number 1 Buckshot, it was a deer killing machine.