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My first gun

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 gun

Unread postAuthor: Teflon » Wed Apr 08, 2009 12:34 am

This is the first Pneumatic rifle I made.

The gun is now about 2 years old and still going strong.

It is powered by around 20 pumps of the bike pump due to a quick fix after a leaky Glue job leaving me with an oversized chamber, the air is released via ball valve, opened by a spring mounted to the stock held back by a basic trigger mechanism made from a large nail. The scope is a 3-7x zoom 20mm scope bought off ebay for 10 bucks australian

I can consistently hit targets as small as coke lids on their side from 10 meters

Powerful enough to pierce 1/2 inch ply, it shoots ball bearings through an aluminium tube mounted inside a pvc pipe, breach loading.

The fact that its self powered and ammo is easily obtainable through ebay (500 bearings for $18 Australian) is a major plus in my eyes

Note the Distance between the bike pump and the ball valve. The bike pump was originally intended to connect as close as possible to the Bottom L connector.

<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0141.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0141.jpg" border="0" alt="Photobucket"></a>

Here you can see the aluminium tube mounted inside the PVC
You can see cloth i used to hold the end "centered" one day while i was out shooting, never got round to a permanent fitting.

<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0149.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0149.jpg" border="0" alt="Photobucket"></a>

Breach open

<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0145.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0145.jpg" border="0" alt="Photobucket"></a>

And closed

<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0146.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0146.jpg" border="0" alt="Photobucket"></a>


<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0142.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0142.jpg" border="0" alt="Photobucket"></a>

Connected to spring which pulls open valve

<a href="http://s613.photobucket.com/albums/tt219/Beezlbubzy/?action=view&current=IMG_0143.jpg" target="_blank"><img src="http://i613.photobucket.com/albums/tt219/Beezlbubzy/IMG_0143.jpg" border="0" alt="Photobucket"></a>

For my next gun I am going to pull apart this gun and replace the ball valve with a piston valve, i will re use the scope, barrel and pump. Ill shape out a much neater more attractive stock aswell.
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Unread postAuthor: inonickname » Wed Apr 08, 2009 12:47 am

Nice ghetto monster there. The inbuilt pump is pretty good. You'll have around a dozen members tell you that a sprinkler or piston would work better but it seems you're onto it.

Good work, especially for a first.
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Unread postAuthor: jook13 » Wed Apr 08, 2009 12:49 am

That is pretty freaking sweet for a first! It is very rough around the edges, but you gotta love that homemade look.

I am looking forward to your redesign. If you build it correctly, you will absolutely love that piston compared to your ball valve. You should build a stock out of oak!
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 08, 2009 12:58 am

inonickname wrote:You'll have around a dozen members tell you that a sprinkler or piston would work better but it seems you're onto it.

Nice to see some ingenuity in action though :) really love the ghetto looks, good job
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Unread postAuthor: starman » Wed Apr 08, 2009 12:58 am

Welcome to Spudfiles Teflon. It looks a little "Mad Max" :wink: but it's a decent effort.

The big spring definitely has the Wile E. Coyote thing going on there... :lol:
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