Paleblue Posted December 10, 2011 Report Share Posted December 10, 2011 Ever since I saw the testing videos of the PAS kit, (which is this: http://shop.ehobbyasia.com/pas-co2-conversion-kit-for-aandk-svd-sniper-rifle.html) I knew it was a step in the right direction because the bolt pull of the A&K with stiffer springs was abysmal. However, I also knew that unregulated CO2 can be just as much as a nuisance. So why can't someone drill and tap a CO2 cartridge to run HPA? Here is the theorized plan. I don't actually have a CO2 conversion kit on me, so I can't verify myself. But technically, couldn't this work? So a cartridge, in the cylinder is drilled, tapped, and connected to a hose as shown by the blue. The hose then runs through the spring guide and down to the grip and finally exits the gun out of a drilled hole in the grip to a regulator and an HPA tank. Is this feasible? :/ Link to post Share on other sites
Horsem4n Posted December 11, 2011 Report Share Posted December 11, 2011 how would the hose move back and forth with the piston? doesnt the co2 capsule sit in what would be the piston? good idea though. i have already thought of a solution to the problem i see though. Link to post Share on other sites
paranoiddroid Posted December 15, 2011 Report Share Posted December 15, 2011 is drilling into a CO2 canister not horrifically unsafe? Link to post Share on other sites
SteevoLS Posted December 15, 2011 Report Share Posted December 15, 2011 ^ Not if it's empty. Link to post Share on other sites
Paleblue Posted December 16, 2011 Author Report Share Posted December 16, 2011 Thanks Horseman. I forgot I'd be pulling the bolt back. Anyhow, the CO2 capsule will be empty. It merely serves as a transition. But can they be drilled and tapped? That's my main question. If that can be done, the rest of the plan seems do-able. Here is the revised plan. So a metal pipe, or something both solid and hollow, is now connected directly to the CO2 capsule. To account for the backwards movement, the pipe will have o-rings to seal the HPA and will not be connected directly to the spring guide. Feasible? Link to post Share on other sites
Sallinen Posted December 17, 2011 Report Share Posted December 17, 2011 I'd say you should make the metal pipe solid with the capsule, and make it move inside some sort of housing which is connected to the spring guide. The bigger pipe which the CO2 capsule pipe moves within, could be drilled and tapped on the spring guide. TBH, I am not familiar with neither the A&K nor the CO2 kit. Link to post Share on other sites
Horsem4n Posted December 18, 2011 Report Share Posted December 18, 2011 nah, paleblue's current plan should work. i have drilled holes into co2 capsules. the metal is very brittle and likes to chip. i would advise trying to drill a hole with a drill press first to see if its possible to get a clean hole, otherwise youll have to get a custom capsule cncd for your needs. Link to post Share on other sites
gisburn20 Posted December 18, 2011 Report Share Posted December 18, 2011 you can buy threaded "co2 powerlets" for bulk feeding crossman air rifles, have looked into this for my sons "Ratcatcher" in the past. http://www.crookedbarn.com/repairs,_parts,_acces_.htm various options are available. Jim Link to post Share on other sites
Ruinz Posted January 2, 2012 Report Share Posted January 2, 2012 If I remember correctly the entire cylinder that holds the CO2 canister is airtight. So you could just leave the canister out and use the cylinder space as a expansion chamber. The easiest way to do this would be to tap the bolt face. So you would have a hose running from the outside of your bolt to your tank. I wouldn't care, but I know to some that aesthetics does matter. Link to post Share on other sites
ED-SKaR Posted January 2, 2012 Report Share Posted January 2, 2012 Drilling an existing brass CO2 bulb and tapping it is a terribly fiddly job and you are likely only to get it wrong over and over. I'd recomend that you get someone with the technical knowhow and equipment to make you an "adaptor" that would fit in the place of the CO2 bulb and have a strong thread for the external rig to screw into. If the bolt is airtight, or some other setup like that, you should seriously consider getting a replacement part and taking it to the afforementioned mechanical person and have a new part made from scratch designed to take the external gas rig. Particularly if the gun is designed to use raw CO2. You do not want to use hand threaded anything when you are using 850PSI. Link to post Share on other sites
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