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Bolt Action Bullpup .45 cal (NEW VIDEOS)

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Re: Bolt Action .45 cal (UPDATE: New Barrel and Shooting Vid

Unread postAuthor: django » Fri Jul 10, 2015 2:05 am

I LOVE it!!!!!!!!, I should try make a similar one, I have been trying to make a good Bolt Action Mechanism that doesn't leak Air. Do You have a Pic or Diagram of your Bolt Action System?.
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Re: Bolt Action Bullpup .45 cal

Unread postAuthor: auxiliary » Mon Aug 10, 2015 7:54 am

Thank you! I think it would be better if you watched my disassembly/reassembly video to get a better idea of how everything works:



I got a chance to test out my idea of adding a smoothbore extension to the rifled barrel. It wasn't as accurate as just the 10.5" rifled barrel by itself. It did seem to do a bit more damage to the stool though. The damage is shown at the end of my shooting video:



I decided to go back to having just a rifled barrel because it isn't that much slower and it's more accurate. Plus it's a lot more compact and light.

And here are some pictures of my final setup and a picture of the rifling:
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Last edited by auxiliary on Sat Mar 11, 2017 10:42 am, edited 2 times in total.
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: Ianbuckwell » Tue Nov 10, 2015 11:35 am

Sorry if I missed it, but when you were using ball bearings coated in wax to give a nice seal, how do you manage to take them out the wax and what do you put them on to stop them from having a flat side, or do you hold them until cooled enough, also what do you hold them with?

Sorry for all the questions, I am still in awe of your gun, did you plan/draw it all out first or just have the idea and made it work?

Thanks Ian
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: jackssmirkingrevenge » Wed Nov 11, 2015 11:49 am

How the heck did I miss this one! Fantastic job!
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: APB » Sun Nov 29, 2015 10:10 am

Once again stunning!!!!

Can I ask when wax coating the balll bearings how do you get consistent coverage and no flat spots? Only way I thought was using a fine mesh.

Many thanks, Ian
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: air_dannon » Tue Dec 29, 2015 10:52 pm

really nice!
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: AlfiePB IanB » Sat Jun 25, 2016 5:22 am

Nice gun! Can you tell me how you coat your ammo in wax without getting flat spots or it all slumping down, do you use a magnet ro hold the ball bearings and then just dunk them in the wax? Also is it just candle wax? Thanks
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: air soft fan » Thu Sep 01, 2016 2:52 pm

found your gun, it awesome. Its so mutch more neet looking than my first one but you probebly have a lot more expertise. Im really going to look in to the QDV what sound good. I think your idee of having a tank on your back an just a little chamber in the gun is really smart. But way did you deleted al the videos on you channel I would like to see some more info or just shotings.
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: auxiliary » Sat Mar 11, 2017 12:59 am

I put the videos back up for your enjoyment!
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: jrrdw » Sat Mar 11, 2017 8:52 am

auxiliary wrote:I put the videos back up for your enjoyment!

Thanks, we love video's! :bom:
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When life gives you lemons...throw them back they suck!
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: Anatine Duo » Mon Mar 13, 2017 11:10 am

Looks like the barrel moves in and out to expose the breech for loading. Is there any play in the barrel when locked in position?

Any tips for solvent welding the big pieces of ABS? Did you roll on the glue?

I'm still amazed how good it looks.

On the video you mentioned just tapping and releasing the trigger instead of slow pull... I thought a QDV would respond just fine to slow pull.
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Re: Bolt Action Bullpup .45 cal (NEW VIDEOS)

Unread postAuthor: auxiliary » Mon Mar 13, 2017 12:02 pm

There isn't any play in the barrel when locked because of the two points of contact. It is a similar sealing system to my most recent combustion cannon "The Jackal" where the wedge of the bolt slide forces the seal against both surfaces.

For the laminating process I just used the standard brush-in-can inside the ABS glue and worked quickly. I would do it layer by layer and press it down as I built it up and then stood on a big board to compact it for a while. I didn't want to make a press.

The tap and release issue was because my piston was a little too tight (it had to hold 800psi back) and the return spring was quite stiff too so the valve needed an extra hand to open all the way.
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