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Spring Airsoft gun

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Spring Airsoft gun

Unread postAuthor: Ryukaji » Fri Oct 24, 2008 3:38 pm

I wanted to make a gun that doesn't run off the air compressor so i was looking to try and make something like one of ant's designs with the ball bearing in a cap but i don't have the supplies yet so i went and made a spring airsoft gun.

My first attempt worked but without triggering system so you held the lever back and let go to shoot .

Im starting my second attempt using 3 tubes to allow for lever to return to original position, and allow for easier reliable reloading system.
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first attempt
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first attempt
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first attempt
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Tubes 002.jpg
2nd attempt 3 tubes
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2nd attempt 3 tubes
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2nd attempt 3 tubes
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Last edited by Ryukaji on Mon Oct 27, 2008 8:40 pm, edited 4 times in total.
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Unread postAuthor: jrrdw » Fri Oct 24, 2008 4:00 pm

Looks like your well on your way! Nice research to, Ant is a good builder.

Welcome to Spudfiles..... :D
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Unread postAuthor: littlebro05 » Fri Oct 24, 2008 4:06 pm

Dude, that is a very beautiful gun lol.

I've been trying to make a springer But haven't really gotten around to it.

How's the fire power / distance, and post a video i wanna see it in action :D
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: Ryukaji » Fri Oct 24, 2008 4:10 pm

littlebro05 wrote:Dude, that is a very beautiful gun lol.

I've been trying to make a springer But haven't really gotten around to it.

How's the fire power / distance, and post a video i wanna see it in action :D


Ill try after i get the new spring in... this ones pretty weak but i could shoot through a paper target with it

does anyone have any idea how to have a working magazine for this thing?
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Unread postAuthor: littlebro05 » Fri Oct 24, 2008 7:32 pm

Hmm if you needed a magazine here's a really simple way of doing it.

Image

That's my original plan of my springer pistol i was going to make

Image

Thats the magazine...

Or basically To make your own magazine you proabbly know how to make a magazine release.

Image

Basically get a flank of wood the same size of each other. Get one plywood and sandwich them together leaving a space between the two flanks. And wolah you have ur magazine slot.

The magazine release is simple. the gold colour bit, picture it as an upside down L and that's what the magazine will catch on.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: Ryukaji » Fri Oct 24, 2008 7:51 pm

littlebro05 wrote:Hmm if you needed a magazine here's a really simple way of doing it.

Image

That's my original plan of my springer pistol i was going to make

Image

Thats the magazine...

Or basically To make your own magazine you proabbly know how to make a magazine release.

Image

Basically get a flank of wood the same size of each other. Get one plywood and sandwich them together leaving a space between the two flanks. And wolah you have ur magazine slot.

The magazine release is simple. the gold colour bit, picture it as an upside down L and that's what the magazine will catch on.



yeah i saw that in your topic when i was browsing but one question what keeps the magazine from loading multiple bbs per shot?
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Unread postAuthor: littlebro05 » Fri Oct 24, 2008 7:57 pm

Basically from where your barrel meets with the piston plunger setup, you drill or cut a hole in the barrel for where the bbs fall in. What keeps the bbs from not rolling out is the force of the spring pushing up against the bb.

Although you might want to make a simple hopup, look back on the topic and you'll see i-will's post on the hop up... basically a slit with an oring in the slit of the barrel.

Oh btw not sure if you haven't so already but you might want to make another barrel or something...

like this one.

Image
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: Ryukaji » Fri Oct 24, 2008 8:44 pm

i dont understand what the 3 tubes are for can you explain what the point of 3 tubes is?
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Unread postAuthor: jackssmirkingrevenge » Fri Oct 24, 2008 8:48 pm

Ryukaji wrote:what keeps the magazine from loading multiple bbs per shot?


Friction ;)

Image

It would however be helpful to include an o-ring or some sort of detent as discussed here that would not only prevent more than one BB being loaded but also allows pressure to build in the chamber, technically giving you more power.
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Unread postAuthor: Ryukaji » Fri Oct 24, 2008 8:55 pm

jackssmirkingrevenge wrote:
Ryukaji wrote:what keeps the magazine from loading multiple bbs per shot?


Friction ;)

Image

It would however be helpful to include an o-ring or some sort of detent as discussed here that would not only prevent more than one BB being loaded but also allows pressure to build in the chamber, technically giving you more power.


but once the first bb moves from the loading area wont another one pop in and shoot out too?
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Unread postAuthor: littlebro05 » Fri Oct 24, 2008 9:03 pm

Not really, usually a springer is designed to shoot one burst of air out and as you can see on the diagram of JSR's theoretically the air will keep the bb down below it.

The point of three tubes are...

1 Outer Tube - Where the piston is kept in place andh elps with it gliding
2 Middle Tube - Is the thing that pulls the O-Ring'd piston back
3. Inner tube - The piston that creates a burst of air to push the bb out.

My designs abit different from yours but the good thing is that after you cock the gun the "lever" goes back into place.

the middle tube has a tube where it pushes and loads one bb like in a commercial springer, except my magazine won't be in the handle of the gun.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: jackssmirkingrevenge » Fri Oct 24, 2008 9:05 pm

Ryukaji wrote:but once the first bb moves from the loading area wont another one pop in and shoot out too?


No, that's the beauty of the system. The blast of air from your piston (represented by the blue area in the animation) does two things, first of all it shoots the first BB down the barrel. Secondly however, you'll notice that the magazine tube is the same diameter as the barrel, so this means as it effectively acts as a sort of second barrel, with the air trying to push the BBs out of the bottom of the magazine tube.

As the pressure from the blast reduces after the shot BB leaves the barrel however, the spring returns the BBs upwards leaving a new one in the barrel, and so the cycle continues.
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Unread postAuthor: i-will » Fri Oct 24, 2008 11:58 pm

littlebro05 wrote:Although you might want to make a simple hopup, look back on the topic and you'll see i-will's post on the hop up... basically a slit with an oring in the slit of the barrel.[/img]


the o-ring hop-up idea is great but if u want accuracy past 20ft it would be ideal to make the hop-up adjustable. this is what worked for me. to do this u only need a small piece of wood, a flat piece of rubber(bike inner tubes work great), a machine screw, a drill, and something to hold it down solid (hose clamps). the screw pushes some rubber through the hole in the barrel and also keeps it sealed. no leaks through the hop-up. the bigger u make the hole, the deeper the hop-up can go. start small. u don't wanna block the bb. a 4mm hole worked great for me.

<a href="http://s90.photobucket.com/albums/k273/PROGRESSKATE/?action=view&current=HOP-UPGHETTO.jpg" target="_blank"><img src="http://i90.photobucket.com/albums/k273/PROGRESSKATE/HOP-UPGHETTO.jpg" border="0" alt="GHETTE HOP-UP"></a>

have fun. :wink:
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Unread postAuthor: Ryukaji » Sat Oct 25, 2008 8:55 am

Ok i understand the 3 tubes now but i waant to keep this gun simple so im just gonna keep it as simply pull back to cock the gun. Maybe after i buy a pack of big springs ill try and make a better gun like a rifle with the 3 tube system. I think i understand now the spring magazine too, but would that need a really weak spring to work?

Im getting the spring today!
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Unread postAuthor: littlebro05 » Sat Oct 25, 2008 2:26 pm

Ryukaji wrote:Ok i understand the 3 tubes now but i waant to keep this gun simple so im just gonna keep it as simply pull back to cock the gun. Maybe after i buy a pack of big springs ill try and make a better gun like a rifle with the 3 tube system. I think i understand now the spring magazine too, but would that need a really weak spring to work?

Im getting the spring today!


Yeah keep it simple, I haven't actually made the 3 tube system but I've sure it will work... But if you're goign to make a bolt action rifle the 3 tubes is the way to go XD because that way you can actually make the bolt part go back to it's original position.

Good luck with the spring, and get us a video I need an inspiration.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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