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| JDP12 |
 Posted: 08/03/2010 14:18 PM Post subject: Unregged CO2 BBMG v 2.0 |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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Hey all, after the dismal failure of this gun-- http://www.spudfiles.com/forums/unregged-bbmg-not-so-complete-after-al l-t19201.html
I've decided to give it another shot in a simpler design. It still uses a sawed down 90 degree tee, just inside 1 1/4" pipe. I'm waiting for the JB Weld on the barrel to dry, then I just have to attach the pressure washer handle and test it! Barrel is 12" brass tubing sleeved in brakeline
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| Gun Freak |
| Posted: 08/03/2010 14:21 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
Posts: 4209
332.12 Spud Bux
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You know the internal pressure at max is only gonna be like 160 psi with unregged CO2 so you could have used like 1" pvc lol but still it's awsome and I want to see a video 
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| JDP12 |
| Posted: 08/03/2010 14:26 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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| No. When making a BBMG you want to prepare for a possible jam that could jack the pressure way up and PVC would instantly explode, especially with the cold CO2. Freezing CO2 is a terrible mix with PVC. I'm also planning on adding a ball detent for higher pressures and velocity.
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| jackssmirkingrevenge |
| Posted: 08/03/2010 14:44 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18056
32511.66 Spud Bux
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| JDP12 wrote: | | I'm also planning on adding a ball detent for higher pressures and velocity. |
Good to hear, good luck with it 
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| JDP12 |
| Posted: 08/03/2010 20:00 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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Thanks. Here's a picture of what it will look like. If it works I hope to make some sort of shell for it so it isn't nearly as ugly and looks more like a submachine gun. Will test tomorrow, and work on ball detent.
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| Gun Freak |
| Posted: 08/03/2010 20:12 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
Posts: 4209
332.12 Spud Bux
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Oh ok yeah I wasn't thinking. But the funny thing is, my bbmg has NEVER jammed on me. Not ONCE! I guess I just did a good job on construction or something lol because I always hear about people's bbmg's getting jammed but it's never happened to me 
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| JDP12 |
| Posted: 08/03/2010 20:21 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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| Most of the time it's due to poor bb quality or debris getting stuck. Never happened to me either but better safe than sorry
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| Gun Freak |
| Posted: 08/03/2010 20:28 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
Posts: 4209
332.12 Spud Bux
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True dat!
Lots of crap like teflon tape and stuff have gotten in my chamber, and I use those crappy cheap Crosman .12gram camo ammo, lol and still no jams, I guess I'm just lucky, but let's not hijack. Can't wait to see the final product, you should definitely put it in a realistic shell, it would be awsome.
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| JDP12 |
| Posted: 08/03/2010 20:44 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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| Yea I try to clean out my chambers real good
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| jackssmirkingrevenge |
| Posted: 08/03/2010 21:45 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18056
32511.66 Spud Bux
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| If you can get a cheapo airsoft MP5 it should be relatively easy to hack up the shell and make it look more decent, but the important thing first is that it work
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| JDP12 |
| Posted: 08/03/2010 22:00 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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Yea. I'd like to do a CBJ-MS PDW , B+T MP9
possibly as well.
If I were to try one of those above two I think I might try doing a CO2 inflator with the grip being the holder for the 12 gram. That way its slightly more realistic.
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| irisher |
| Posted: 08/03/2010 22:08 PM Post subject: |
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Lieutenant Colonel
Joined: 29 Dec 2008
Posts: 435
385.17 Spud Bux
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| The adjustable hop-up is really nice on HPA bbmgs. Although on mine it lead to an increased amount of jams, it looks like yours can handle jams pretty well but I thought you might want to know.
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| JDP12 |
| Posted: 08/03/2010 22:12 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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| Awesome thanks! Yea I'm going to have to get on that soon, but I'd like to just test the bare gun itself to make sure that works.
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| irisher |
| Posted: 08/03/2010 22:14 PM Post subject: |
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Lieutenant Colonel
Joined: 29 Dec 2008
Posts: 435
385.17 Spud Bux
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| Just a hint, for a really cool effect once you have verified the safety of it, try getting a little liquid Co2 in your line and shooting it. It makes for a pretty cool "muzzle flash"
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| JDP12 |
| Posted: 08/04/2010 14:54 PM Post subject: |
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Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
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| Well i tested it.. and it did work! Firing was a little sporadic so I may add a plunger to help feed more reliably. Thing is a GAS HOG though. I emptied a 20 oz CO2 bottle in about a minute... so some sort of detent is definitely necessary, otherwise this thing will get expensive to shoot quick.
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