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here is my new bb 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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Unread postAuthor: starman » Tue Nov 18, 2008 8:35 pm

ckman wrote:ok well do you think there is a way to make it more powerful this is already very powerful but I am looking for something more like what type of thing is this guy useing on the link above


Try your best not to double post.

That's a semi-auto airsoft gun and while very cool, probably well beyond your capability at the moment.
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Last edited by starman on Wed Nov 19, 2008 8:40 am, edited 1 time in total.
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Unread postAuthor: Ragnarok » Tue Nov 18, 2008 9:01 pm

Although I applaud your optimism for what you want to be able to do, I think you need to temper it with a dash of realism. That was made by our very own JSR, and as spudders go, he knows his stuff.

It's perfectly conceivable that you will be able to do that kind of thing in the not too distant future, but based on your woodwork, I think you definitely need neater and more precise building skills before you take off on such a project.
The design isn't overly complicated, but it needs to be built fairly precisely to work reliably, and if you try building it when you haven't got the ability, you'll likely just end up disheartened by the results.

I made the mistake of aiming too high when I was starting out in spudding and I deeply regretted it at the time - fortunately I didn't put too much time or money into it.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: jackssmirkingrevenge » Wed Nov 19, 2008 12:49 am

I agree that the flow forward design is perhaps a tad complicated, think about something like this:

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Unread postAuthor: ckman » Wed Nov 19, 2008 9:43 am

ok thanks and do you guys know of any good tubes to use as airsoft barrels
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Unread postAuthor: Ragnarok » Wed Nov 19, 2008 12:31 pm

ckman wrote:ok thanks and do you guys know of any good tubes to use as airsoft barrels

Usually the simple solution here is to get a few BBs and head down to the local DIY store and see they have any brass or copper tubing that's a neat fit.

I believe that there is a size of brake line (6mm, or it might be called 1/4") in the US that is reasonable for BBs (not perfect, but it does the job) which can be found in automotive parts stores - or alternatively, although I'd only recommend it for a very serious project, you could buy a proper tight bore airsoft barrel.
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Unread postAuthor: jitup » Wed Nov 19, 2008 12:57 pm

I do not know how well a brake line would work for airsoft BB's. the 1/4 brake line works for metal bb's but they are smaller than the plastic airsoft bb's. If you are making a prototype of a short barrel gun you can use a bic pen as the barrel as a temporary. The best thing to due is measure the BB with a micrometer and take your measurement to a local machine shop. ask for an aluminum tube with the desired dimensions. If they not have what you need in stock they can probably order some cheap. If you are curtious and are not demanding they may even just give you a piece for free if it is not to big. Who knows maybe they have a piece of scrap that is perfect for what you need. :)
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Unread postAuthor: Gippeto » Wed Nov 19, 2008 2:06 pm

Brass tube at the hobby shop, 9/32" od with a wall thickness of .014" is a pretty decent fit with airsoft bb's.

1/4" brake line does work with .177 bb's or pellets.

I believe I've read somewhere that 5/16" brake line works with airsoft bb's, but I've not checked the fit.
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Unread postAuthor: ckman » Wed Nov 19, 2008 8:46 pm

oh is it a hammer valve I think that is what I meant
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Unread postAuthor: ckman » Wed Nov 19, 2008 8:59 pm

so does any one have some instructions on how to make a hammer valve
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Unread postAuthor: Gippeto » Wed Nov 19, 2008 9:14 pm

ck, if you seriously want to learn how to make things, you have to stick with one thing until you have it down.

Jumping from one idea to another is going to lead to frustration, and a closet full of half completed projects.

You have a half completed project here, I recommend you try to stay focused and complete it.

You WILL learn more that way.

AND, you'll have something to show for your efforts. :D

Believe me, I have struggled with this too. A large project takes so $%$#ing long, while fresh, new ideas keep popping up. The desire to chase after the new idea MUST be resisted until the first project reaches completion.

Help is only a post away. :)
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Unread postAuthor: ckman » Wed Nov 19, 2008 9:26 pm

well i know that i am trying to add the hammer valve to this one so i could make it more powerful if that is possible
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Unread postAuthor: Gippeto » Wed Nov 19, 2008 9:33 pm

The video you posted (JSR's) is of a blow forward bolt.

There is some info on hammer valves in this thread, as well as a link to an instructables.

http://www.spudfiles.com/forums/air-gun ... rt,15.html

On a side note, did you finish your copper piston gun yet?
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Unread postAuthor: ckman » Thu Nov 20, 2008 9:59 am

ok so if that acts as a blow gun would it be any better to use that because it looks more powerful but I don't know if it is
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Unread postAuthor: Gippeto » Thu Nov 20, 2008 10:18 am

Are you referring to the hammer valve, or the blow forward breech in the video?

The blow forward breech is a LOADING MECHANISM. You can clearly see that he is using a blow gun as the main valve.

What you have started should shoot harder.

The hammer valve we discussed via pm. I don't think you have the experience to pull that off yet.

In time, sure, but not right now.
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Unread postAuthor: ckman » Thu Nov 20, 2008 10:35 am

no I can pull the hammer valve off I am half way done with it
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