Dart Gun
This is the dart gun I recommend. Leave none alive with this 5 Shot Hammer Action Revolver, made by Nerf. She can be primed with one hand, just like a real single action revolver. Includes Dart Gun and 10 Darts.
Holster
I made this holster from 3mm cardboard wrapped in yellow cloth tape, with silver duct tape used in some areas, and a black belt clip for easy attachment to shorts or pants. It features a belt clip on the back and a dart pocket on the front for 3 darts. I bought the black belt clip in a pack of 25 from Amazon, and the cloth tape and duct tape from a local dollar store. The cardboard was from a cardboard mail box. After cutting out your cardboard, cover every face with cloth tape. This prevents moisture getting in, protects the cardboard from the blaster, and provides quite a bit of structural integrity. Note: I believe 2mm foam card could be used as an alternative to cardboard and may be better as it is more moldable than cardboard, though I have not tested this.
Backyard Blasters 