I started with a AirBlasters Double Shot soft dart gun by Buzz Bee Toys. I was going to use a Nerf Barrel Break but the Double Shot just made a better base for victoriana / steampunk gun. The Double Shot also features auto-ejecting shells which are frankly amazing.
After disassembling the Double Shot (they are no where near as well engineered as the Nerf ones) I sprayed all the parts with a matt black spray paint. Just for fun (and to check I could actually remember how) I put the gun back together to see how it looked in flat black.
Now here's the bit I forgot to take pics of, but there is a combination of nut brown and brass paint for the stock and pewter spray paint for the barrel. After two layers in most places I attached the three valves.
The valves are stuck into three copper pipe brackets that I cut into so they would slot into each other. The whole lot were then mounted onto the side using a combination of screws and hot glue.
I also glued on a nasal spray bottle with a glass bottom. If I get time I might put a light in there as well.
Finally I added some brass coloured raised transfers (normally for cards and scrapbooks) to give it a bit of style and covered the finished product in some clear spray paint for protection.
Future changes / next model - I need to find a better way of attaching the valves, hot glue just doesn't cut it. Add a light / LED to the glass bottle of the nasal spray.









































The vavles I used are actually old 1960s valves that I got from eBay. As long as the valves fit whatever braket you are using to hold them to the gun you should be fine..
The idea for the valves actually came from Bioshock and some of the original designs they did.
I have to confess to actually never playing Call of Duty.
It was a toss up between the valves and some old filament bulbs running at low power. In the end the valves were easier to get hold of so those went on instead.
Purely from a personal steampunk aesthetic I'm cautious about having too many lights / LEDs etc in an era that didn't feature that much light. On the other hand if I can find the right bulbs or find a way to fit lights to the existing valves it'll probably happen :)