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My first (but not last) unnamed sniper 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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My first (but not last) unnamed sniper rifle...

Unread postAuthor: kaiser271 » Mon Oct 15, 2007 11:07 am

I have been working on this rifle on and off for about 3 weeks now. It isn't my first but is my best to date. It is made from thick wall 3/4" pvc except for the barrel which is thin wall.

<a href="http://photobucket.com" target="_blank"><img src="http://i238.photobucket.com/albums/ff78/kaiser271/1.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>

All in all the rifle fires very well. The only time I was able to fire it was at night so I couldnt see how far the projectiles went. They were fired over water so I could count how long till they splashed down which was roughly 8 seconds and that was at only 50 PSI!

I don't have any damage shots yet because the neighborhood I live in wouldn't exactly be happy with me firing it, so I have to wait till most people are at work or late at night. But damage pics will be coming as soon as I can take some! If you have any questions or anything about the rifle feel free to ask or PM me. Hope you like it!
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Attachments
10.jpg
The ammo holder.
9.jpg
A shot of the breech open and ready to be loaded.
8.jpg
A shot of the breech closed.
7.jpg
The modded Rainbird JTV and Husky blowgun assembly.
5.jpg
A closeup of the barrel, pressure gauge and lasersight/flashlight assembly. If you look closely you can see the copper pipe inside of the pvc.
4.jpg
A comparisson of the size of the ammo and rifle next to a soda can.
3.jpg
An angle fromt he top and side howing the breech and front of the rifle.
2.jpg
1.) Silencer - An actual silencer that drastically reduces the sound produced. It was made by drilling a ton of small holes in the end of the barrel. The then area with the holes was covered with foam pipe insulation and then finished off with another piece of pvc around the foam to act as a sleeve.

2.) Barrel - To the best of my knowledge and what I have read on the site I am the first to do this: encase a copper tube with pvc to ensure a perfectly straight and durable barrel.

3.) Breech Loading - The rifle is loaded via a breech loading assembly. Simply twist the barrel and slide it forward.

4.) Scope - Nothing more than a piece of 3/4&quot; thick wall pvc and two couplers, it is there mainly for looks.

5.) Sprinkler valve - a Rainbird JTV valve that is modded to use a blowgun as the trigger system.

6.) Ammo holder - I did not come up with the idea for this system and I forgot who did because it is an awesome idea and they deserve the credit. The ammo itself is 3/4&quot; wooden dowels cut down to size.

7.) Blowgun valve - A Husky blowgun valve used for the trigger system.

8.) Loading valve - A standard Schrader valve which will be changed to a quick disconnect setup when I get a compresser.

9.) Main Air Chamber - The main portion of the air chamber is 2&quot; thick wall pvc that is attached to the stock which is also part of the chamber. I have read that people say that having so many angles in the chamber reduces the exitting air pressure but after many tests using varying air chamber styles and setups I have found that the angles decrease the velocity a negligable amount.

10.) Bipod Coupler - The bipod is attached here.

11.) Laser Site/Flashlight - This is a laser site and flashlight combo I found on a plastic BB gun toy. I liked it so I took it off and used it.

12.) Pressure Gauge - A pressure gauge that reads up to 120 PSI.

13.) Bipod - A simple bipod made from leftover pvc pieces that is removable.

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Unread postAuthor: MaxuS » Mon Oct 15, 2007 1:07 pm

Wow, thats quite impressive for one of your first. Since the blowgun and Sprinkler Valve are quite close anyway, cut the hose down so it just goes straight from one to the other, it'll reduce your pilot volume and wont get in your face when you try to fire :D
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Unread postAuthor: paaiyan » Mon Oct 15, 2007 1:15 pm

Looks nice, I like the biohazard decal. Just a note though, in America, silencers are illegal, just keep that in mind.
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Unread postAuthor: LikimysCrotchus5 » Mon Oct 15, 2007 1:52 pm

I didnt know that silencers are illegal in america, do you mean on real guns or just spud guns. But anyway nice for a first sniper, i agree with the peoples^^ up there :)
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Unread postAuthor: paaiyan » Mon Oct 15, 2007 1:54 pm

From what I understand, any device made for, or that can be adapted to suppress the report of a firearm by even 1 dB, is considered a silencer, and they are illegal. So even if you make one for a paintball gun, it can be illegal. now, with that said, obviously nothing happens if you don't get caught, just don't say nobody warned you if you do.
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Unread postAuthor: kaiser271 » Mon Oct 15, 2007 2:05 pm

thanks for the comments and the heads up about the silencer. to be quite honest im not even sure how legal pneumatic guns are in general, lol. there are a few things i would have changed so i think i will in the second version of it. the main one is the length of the fill tube with the Schrader on it. any other ideas on improvements?
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Unread postAuthor: paaiyan » Mon Oct 15, 2007 2:10 pm

As for the legality of your cannon, as long as it's used recreationally and you're not shooting dangerous things with it, the ATF says it's not a firearm, and therefore not subject to those regulations. Legality varies by state and local governments though.
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Unread postAuthor: iknowmy3tables » Mon Oct 15, 2007 2:43 pm

awesome sniper, I used a ammo holder on my sniper, a lot of real guns have ammo holders on the stock its and old idea for sporting arms
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Unread postAuthor: TwitchTheAussie » Mon Oct 15, 2007 5:11 pm

I am very impressed. This is some good work. keep it up mate :thumbright:
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Unread postAuthor: Killjoy » Mon Oct 15, 2007 9:12 pm

From what I understand, any device made for, or that can be adapted to suppress the report of a firearm by even 1 dB, is considered a silencer, and they are illegal. So even if you make one for a paintball gun, it can be illegal. now, with that said, obviously nothing happens if you don't get caught, just don't say nobody warned you if you do.


Right, but also my understanding is any silencer bore greater then (but not equal to) 3/4", ATF won't mess with you since it becomes to difficult and a waste of time to use something that large to try and silence a firearm. But unless you go commit a crime or post on some website saying "look at me I got a silencer, arrest me". Your fine.
Nice rifle by the way. The biohazrd symbol and shell holder are a nice touch.
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Unread postAuthor: Novacastrian » Mon Oct 15, 2007 9:21 pm

Great looking rifle mate, one thing i would change is the size of the silencer, it looks the goods now but would work so much better if its capacity was increased, at least as big as the chamber :)
That way your nosy neighbours wouldn't know how the hell all those dents appeared in their fence :twisted:

Edit: Just make sure you retrieve your ammo!
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Unread postAuthor: ShowNoMercy » Mon Oct 15, 2007 10:08 pm

Make your ammo out of ice, and then it would disappear overnight. :lol:
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Unread postAuthor: Novacastrian » Tue Oct 16, 2007 12:07 am

ShowNoMercy wrote:Make your ammo out of ice, and then it would disappear overnight. :lol:


Off topic i know, but i will have to try ice ammo, or rather frozen mince meat like they Jamie and Adam tried on Mythbusters.
Maybe another competition to see what damage can be done with frozen ammo is in order :twisted:
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Unread postAuthor: origin unknown » Tue Oct 16, 2007 12:53 am

That is sick lookin! I like the red bolt and black paintjob. The copper/pvc barrel design has never been used to my knowlege and is pretty cool. The only thing that could improve it would be black tubing instead of the clear tubing.
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Re: My first (but not last) unnamed sniper rifle...

Unread postAuthor: Pyro Ninja » Tue Oct 16, 2007 1:17 am

Not trying to burst you bubble, this really doesn't make any difference but schmanman sleaved his copper barrel with pvc but thats in spudshot, cant remember if he posted it here...
anyway your pics don't work for me :(
but everyone else seems to like it so good job :)

http://www.spudshot.com/Forum/viewtopic.php?t=223
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