SpudFiles

I built this a few weeks ago for a Nerf tag scenario game called Humans Vs. Zombies. The nature of the game called for a "shotgun" type weapon to be used early on for eliminating a target. I threw this together in about 15 minutes and fired it only once in the game as expected... it performed its task flawlessly.

It's a brutally simple gun, really. The reservoir consists of a 3/4" brass ball valve with extended lever, an 8" length of 3/4" steel pipe, a 3/4" steel coupling, a 3/4" x 1/8" brass bushing, and an 1/8" NPT schrader valve. There are 7, 1/2" CPVC barrels lining the inner circumference of 2" sch40 PVC pipe and an 8th barrel in the center. The gaps are filled in with silicone. The 2" pipe is then adapted down to thread into the ball valve.

The whole thing was taped over with bright colored duct tape so that I could carry it around in the game area without any trouble.

The shotgun is filled using a 12 gram CO2 tire inflator (shown) but can also use a bike pump. It gets two fills from one cartridge.





Nothing impressive, I know, but a revisitation of the simple things can be good sometimes.

I wouldve done it with a burst disk for that loud shot gun bang, but if you like the BV keep it. I really love simply effective guns

Cool I like the idea, but it is a gas hog! I'd go with an onboard pump. Nice job!

Nice.

It gets two fills from one cartridge.

How much psi is in the cartridge to begin with, and what pressure do you fire it at?

I'm pretty sure the carts hold 800-1000 psi depending on the temperature at which they are stored.

I imagine the actual firing pressure is much less considering only about half the cartridge's volume is used per shot, and that volume also expands inside the chamber. Without a gauge I really don't know.

I'll put this thing on eBay for $10 if someone wants to find out for themselves.