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.50 cal Bullpup selective fire rifle

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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.50 cal Bullpup selective fire rifle

Unread postAuthor: irisher » Wed Feb 09, 2011 4:17 pm

I'm snowed in and bored out of my mind so I thought I may as well post my new project.

Caliber: .50 cal (type K copper)
Ammo: lead musket-ball with a brass tail for stability
Stock: hand carved hardwood stock with a cherry penetrating oil finish
Magazine: Aluminum construction box magazine
Magazine capacity: 9 with normal magazine, ~ 20 with the extended magazine
Scope: Redhead 4x32 rimfire scope
Valve: 1/2" European style QEV
Pilot: 1/4" direct acting 24 volt 3-way valve
Air reservoir: 1 1/2" steel conduit
Receiver: Cast epoxy block
Action: long stroke gas piston with locking mechanism

Unfortunately I do not have access to the cannon right now but when the snow melts I will be able to post some pictures.

Edit: I forgot to mention that the 555 circuit that allows 3-shot burst and full-auto is being problematic so its only semi-auto right now.
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Last edited by irisher on Tue Mar 08, 2011 6:47 pm, edited 1 time in total.
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Unread postAuthor: Lockednloaded » Wed Feb 09, 2011 6:41 pm

wow. can you make a diagram of your loading mechanism? it sounds awesome
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Unread postAuthor: Gaderelguitarist » Wed Feb 09, 2011 6:41 pm

Sounds like one heck of a build. Can't wait to see pictures of that hand carved stock. Seems like this is a crowd pleaser of a project.

I'd be wary about that scope though. I bought a similar scope by the same brand and it's a total piece of junk. Doesn't stay true and slides all over the place. I'm not trying to presume that I know how your scope handles.

Good luck figuring out that 555 circuit.
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so many muchness
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Unread postAuthor: irisher » Wed Feb 09, 2011 7:13 pm

@gaderelguitarist
The scope was free because it's lateral adjustment does not work so I expect little in the way of accuracy. Also the stock is based on the WA2000 so that's what you can expect.

@LockednLoaded
The action is similar to BtB's but with some modifications to allow it to work with cylindrical ammo.
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Unread postAuthor: Lockednloaded » Wed Feb 09, 2011 7:21 pm

so do you use cartridges to protect the tails?
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Unread postAuthor: irisher » Wed Feb 09, 2011 7:40 pm

no cartridges. The way I attach the ball to the tail supports the inside of the brass.
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Unread postAuthor: irisher » Thu Feb 10, 2011 10:22 pm

Image

Sorry this is the only pic I could manage for now. It is my aluminum short magazine.
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Unread postAuthor: Lockednloaded » Fri Feb 11, 2011 12:35 am

wow, I can already tell I'm going to be spitefully envious of this project :lol:
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Unread postAuthor: POLAND_SPUD » Fri Feb 11, 2011 12:52 pm

yeah same here... me envy.. me hate you!! :-D
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Unread postAuthor: irisher » Sun Feb 13, 2011 6:44 pm

Well I disassembled it momentarily so I thought I would take some pic for you guys. Image
This is the trigger assembly sans switch. As you can see the paint has been scratched some so i will have to switch to a more resilient paint. This entire assembly is 1/8" thick aluminum.
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Unread postAuthor: irisher » Mon Feb 14, 2011 11:43 pm

I know this is a double post but I have a new pic and this thread has slipped off the recent topics bar.
Image
This is the rear wood stock.
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Unread postAuthor: JDP12 » Tue Feb 15, 2011 12:33 am

dang!! this gun is looking awesome cant wait to see the whole thing.
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Unread postAuthor: Gaderelguitarist » Tue Feb 15, 2011 1:37 am

This is the rear wood stock.


Looking good. I'm trying to figure out where you put your thumb though.

I can't wait to see the full construction. I get the feeling that you're getting some sick pleasure out of teasing us with pics of it's components.
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so many muchness
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Unread postAuthor: ilovefire » Tue Feb 15, 2011 2:01 am

cant you just take one picture of all the parts you got together?
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why make it if it dosent shoot?
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Unread postAuthor: irisher » Tue Feb 15, 2011 5:10 pm

It is not together anymore and there is no point putting it back together just to take apart again because the electronics are being worked on.

@gaderlguitarist
I was originally planning for a thumbhole stock but got a little generous with the router when cutting out a battery compartment.
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