CO2 cartridge rifle
-
stuffbuilder
- Private 4
- Posts: 80
- Joined: Tue Aug 30, 2011 8:56 pm
Here's my latest project. Its an air rifle with a 4 foot long 3/4 inch barrel made to shoot spent 12 gram CO2 cartridges. I carved the stock and grip by hand from a single piece of teak. All the metal plates also started out as raw sheet metal that I cut and filed down by hand. I decided to go with a manual valve for simplicity and the fact that the solenoid would have been in the way.
- Attachments
-
- Here it is. End to end its just shy of 5 feet
-
- A close-up of the trigger. Just an ordinary converted sprinkler valve
-
- I just glued a thin piece of foam to the end of the stock to act as a bit of padding
-
- A closer look at the back of the gun
-
-
jackssmirkingrevenge
- Five Star General
- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
Nice fusion of traditional and modern materials, it has a quirky yet pleasant look 
damage pics/videos!
damage pics/videos!hectmarr wrote:You have to make many weapons, because this field is long and short life
-
stuffbuilder
- Private 4
- Posts: 80
- Joined: Tue Aug 30, 2011 8:56 pm
Ran into a little bit of trouble testing the gun today. Apparently a glob of fiberglass resin doesn't seal up the old pilot valve port on the sprinkler valve. Would a glob of easy-mix epoxy (the stuff that comes as a cut-and-knead stick) made to patch plastic tanks work any better? If not, what would?
-
jackssmirkingrevenge
- Five Star General
- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
If you want epoxy to stick to plastic you have to roughen it first, a file is a good idea, dremel is even better 
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
stuffbuilder
- Private 4
- Posts: 80
- Joined: Tue Aug 30, 2011 8:56 pm
After three failed attempts to seal the valve with epoxy, I managed to plug the leak with some superglue and test fire the gun. All the shots were taken from about 15 feet at 80 psi. Not pictured is a piece of 2x4 that I couldn't break (it was pretty small and kept getting blasted away)
- Attachments
-
- First shot: a thin piece of paneling. It's only about 1/8 inch thick and broke pretty easily
-
- Second shot: a chunk of a pine plank about 3/4 inch thick from the scrap wood bin. You can see the dent left by the cartridge
-
- Third shot: a brick I found in my yard. This one actually deformed the co2 cartridge
-
pneumaticcannons
- Specialist 3
- Posts: 392
- Joined: Sat Oct 30, 2010 9:45 am
- Location: shite country in asia
- Contact:
Superglue will eventually fail. Have you tried taking the valve apart and sealing it from the inside?
ramicaza <- My Youtube Channel
-
stuffbuilder
- Private 4
- Posts: 80
- Joined: Tue Aug 30, 2011 8:56 pm
I filled the hole where the solenoid was with epoxy, but air still slowly seeped out from around the plug. I just used a little superglue on the inside of the valve to fill in the corners where the epoxy couldn't get.
-
beastmode986
- Specialist
- Posts: 170
- Joined: Sat Mar 03, 2012 11:13 am
very nice! what did you use for the barrel? it looks like 3/4 schedule 40
-
mattyzip77
- Sergeant 3
- Posts: 1249
- Joined: Tue Jun 28, 2011 12:22 pm
- Location: Taxachusetts
Cool gun you got there. you gotta use the two part liquid type epoxy not the knead stuff. j b weld is the best use that cuz the super glue wont last forever. also did you let the epoxy set long enough, like over night?? I bet you didnt. Well nice cannon man...
Go Bruins!!!!
-
stuffbuilder
- Private 4
- Posts: 80
- Joined: Tue Aug 30, 2011 8:56 pm
I used Bondo fiberglass resin. The mixture is mostly resin with only a few drops of catalyst mixed in to get it to harden. I scratched up the inside of the hole pretty well, but no matter what I did it wouldn't completely seal. I let the thing sit nearly a week before I put any pressure behind it.
-
mattyzip77
- Sergeant 3
- Posts: 1249
- Joined: Tue Jun 28, 2011 12:22 pm
- Location: Taxachusetts
Ya last time I ckecked bondo isnt made for pressure, epoxy however is,,,,
Go Bruins!!!!
-
jackssmirkingrevenge
- Five Star General
- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
Try cutting the cartridges in half and weighting them with a bit of lead melted into the nose, they will fly straight.
hectmarr wrote:You have to make many weapons, because this field is long and short life
y , let it dry 24 hrs then have fun!!!!-
beastmode986
- Specialist
- Posts: 170
- Joined: Sat Mar 03, 2012 11:13 am
whats kinda range you getting from it?