inonickname Posted July 24, 2009 Share Posted July 24, 2009 (edited) http://www.instructables.com/id/Homemade-400-psi-airgun/http://www.uksgc.co.uk/forums/index.php?sh...5&st=0&http://www.spudfiles.com/forums/the-detruisezier-t18754.html Thought I'd post my latest build here (from SF) Barrel: 15.5mm x 1.2m, 1:30 rifling (ammo; wadded marbles)Chamber: 15.5mm x 80cmOperating pressure: 120-400 psiValve: QEV (will upgrade to a slightly larger valve when I get the time, porting is restricted by perhaps 2mm- RAWR POWER NAZI)Ported by a blowgun, QD fill (internal check valve built in)Semi-bullpup configurationMuzzle loading- unfortunately the fitting I use is about 1.5mm too small I.D. to load a marble. I'm going to have to say it's quicker than unthreading an adapter anyway.. Tomorrow I'm heading up to the tip to get a fridge compressor (GF environment) seen as I'm getting lazier and lazier with pumping. Construction is mostly aluminum, with some brass and stainless. One of the brass fittings for some odd reason is at a slight angle, so the chamber ends up meeting with the barrel which turned out to work quite nicely. When I get the fridge compressor/hand pump going I'll brew up some sodium hydroxide and aluminum and use hydrogen. Accordinto GGDT with a light projectile I'll go well past mach, which is cool I guess. I felt like getting the good camera out to justify how good this thing looks, so here we go: http://i266.photobucket.com/albums/ii259/nonicknameowns/newgun001.jpgWith our MIG for scale http://i266.photobucket.com/albums/ii259/nonicknameowns/newgun002.jpgYum http://i266.photobucket.com/albums/ii259/nonicknameowns/newgun003.jpgLooking down the bore, you can see the start of the riflings http://i266.photobucket.com/albums/ii259/nonicknameowns/newgun004.jpgMuaha... At a can full of water, notice how the top ended up dented: http://i266.photobucket.com/albums/ii259/nonicknameowns/Photo0232.jpghttp://i266.photobucket.com/albums/ii259/nonicknameowns/Photo0233.jpg It has some go to it at 120 psi, can't wait to see what 400 will do (unless anyone wants to come to WA and pump it up with my shock pump). Sooo going to the tip and ripping a fridge apart tomorrow Youtube video http://i266.photobucket.com/albums/ii259/nonicknameowns/Photo0239.jpghttp://i266.photobucket.com/albums/ii259/nonicknameowns/Photo0240.jpgIron sights from .22LR added Any thoughts? I'm going to add a 4x20 scope or perhaps a red dot sight soon . Edited July 24, 2009 by inonickname Link to comment Share on other sites More sharing options...
JrayJ Posted July 26, 2009 Share Posted July 26, 2009 Really nice, if you plan to rip the compressor out of a fridge be forewarned it is going to take a VERY long time to reach 400 psi, if it's even capable of reaching 400. Link to comment Share on other sites More sharing options...
inonickname Posted August 7, 2009 Author Share Posted August 7, 2009 Really nice, if you plan to rip the compressor out of a fridge be forewarned it is going to take a VERY long time to reach 400 psi, if it's even capable of reaching 400. They are definitely able to do that, often up to 600 psi is the average. It may not be as fast as plugging it into a shop compressor, but it's a fair bit quicker than using my homemade pump. Anyone else? Link to comment Share on other sites More sharing options...
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