Pneumag set-up on ebay... with a twist

[wjr]

I saw this link to an ebay auction on MCB.

http://cgi.ebay.com/Automag-pneu-mag...QQcmdZViewItem

Undoubtedly the cleanest pneumag set up yet.

And ZapTheMad, (I would at least assume that it's your creation) can you give us some details on it?

[robnix]

I saw this link to an ebay auction on MCB.

http://cgi.ebay.com/Automag-pneu-mag...QQcmdZViewItem

Undoubtedly the cleanest pneumag set up yet.

And ZapTheMad, (I would at least assume that it's your creation) can you give us some details on it?

Wow!

[geekwarrior]

hmm...would love to see it in action

[Shingo]

The only problem is that the seller is not providing any video so there is no proof that this thing even works. Not a bad find if it is truely a working drop in Mag pneukit.


~Shingo~

[havocx]

Damn you WJR. I was keeping this a secret I have been watching this since it was listed

[wjr]

Damn you WJR. I was keeping this a secret I have been watching this since it was listed

Aww... sorry.

It looks like Going_Home has gotten to it. I'd watch out.

[ZapTheMad]

Sorry guys, I don't have a video camera. You'll just have to take my word for it the old fashioned way. I have no reason to make things up and I'm not much of a "show-off".

What would you guys like to know? It's pretty easy tho, as some have said, it's just an MPA and MSV combined into a single part. Getting the blow-by under control and the exhaust timed is a bit tricky. Other than that, it's pretty straight forward. My original plan was to actually attach these two parts together but it evolved into this.

[havocx]

Aww... sorry.

It looks like Going_Home has gotten to it. I'd watch out.

LoL Going Home gets to everything lately. I had to buy it now on a X mag because I thought he might start bidding on it. He has been bidding up a storm on everything from Canada and the US.

[wjr]

Sorry guys, I don't have a video camera. You'll just have to take my word for it the old fashioned way. I have no reason to make things up and I'm not much of a "show-off".

What would you guys like to know? It's pretty easy tho, as some have said, it's just an MPA and MSV combined into a single part. Getting the blow-by under control and the exhaust timed is a bit tricky. Other than that, it's pretty straight forward. My original plan was to actually attach these two parts together but it evolved into this.

After reading the full description, I understand it all pretty well now.

I've got a suggestion for you though... Make more!

LoL Going Home gets to everything lately. I had to buy it now on a X mag because I thought he might start bidding on it. He has been bidding up a storm on everything from Canada and the US.

Hehe, yeah. I've noticed that. And not just automag stuff.

But it looks like another AO'er is winning the bidding right now.

[ZapTheMad]

Now that the "cat's out of the bag" so to speak. Please don't let this leak over to PBN. I really want it to go to a good home. That's why I chose ebay. The noobs aren't looking for Automags.

[paintball-lizard]

Now that the "cat's out of the bag" so to speak. Please don't let this leak over to PBN. I really want it to go to a good home. That's why I chose ebay. The noobs aren't looking for Automags.

Yeah im watching it too might even bid on it if you would ship it to the UK.

[Nick E]

Now that the "cat's out of the bag" so to speak. Please don't let this leak over to PBN. I really want it to go to a good home. That's why I chose ebay. The noobs aren't looking for Automags.

Now that isn't really fair, I don't think that anyone on PBN would be interested unless they are a genuine mag user...
But, are you planning on making more, or would you be comfortable releasing diagrams to the general AO public?

[ZapTheMad]

I have seen the horror! I can just see some kid hot glueing my manifold in an ego frame then duct taped to a Talon. NOOOOO! LOL! This manifold needs TLC. It needs to be taken apart, cleaned, oiled, and cared for just like your Mag. If you cannot put a Mag together from scratch you have no business playing with this toy. I can't stress this enough and I don't care about selling a million of these. I created this mod because I love to tinker and want to share with fellow tinkerers. The last thing I need is some noob blowing up my reputation on the internet because they don't understand how simple things work. Simple things like... not losing small parts, not over tightening screws, keeping things lubricated for best performance, understanding basic physics, etc...

I've had a few questions on the design aspect. No secrets, no diagrams, what you see is what you get. If you measure the inside of your Intelliframe you will have the external manifold dimensions. If you measure the inside of an MSV and MPA you have the internal dimensions. Then you connect the MSV and MPA with a carefully placed hole.

Pneumagger asked some questions about the piston but his inbox is full. They were some good technical questions so I will answer here.

The forces of RT are more than adequate for returning the piston without a spring. While testing this mod, I found that you need more pressure to make the trigger work than actually fire the gun. There was a couple times where I sweet spotted the pressure on the sear and the gun will go full auto! The force on the sear was strong enough to fire the gun but low enough that the RT can push back. It was amazing! But I could not reliably duplicate the effect. On a side note, the aluminum trigger is very heavy to the manifold. Leverage and mass play a huge part in this. Using a lighter trigger will increase performace because there is less mass to push around. Carbon fiber anyone?

In typical pneumag setups the piston is forced to make a linear movement by mechanical means. The rod thats put in there is guided by the washer held in by a snap ring. But the sear moves in an arc, not linear. So now we have extra moving mass, binding, friction, all added to the works to make the piston go in a straight line. Why?

I have eliminated all of these extra parts, decreased moving mass, decreased friction, decreased volume, and made it work more simple. The piston is floating, not rigid, and is intended to "wobble" with the sear. The angle of the piston actually follows with the sear as it moves in its arc. It wobbles enough to prevent binding, but doesn't turn sideways enough to do any damage. The delrin piston simply floats between the bore and sear on 2 pieces of rubber. I could use a piston made completely of rubber, a rubber ball would probably work. In fact, imagine my piston as a rubber ball in the bore. The MPA piston is just the right shape to allow this wobble. If the sear travelled any farther, it could turn sideways enough to start scraping the bore. But it just happened to work out perfect.

[wjr]

There was a couple times where I sweet spotted the pressure on the sear and the gun will go full auto! The force on the sear was strong enough to fire the gun but low enough that the RT can push back. It was amazing! But I could not reliably duplicate the effect.

This has been done (reliably too) in other pneumag projects. I think the trick was to use a on-off with a .712 pin and quad o-rings (an emag on-off). There's a video somewhere of a pneumag cycling full auto. It was pretty amazing.

The forces of RT are more than adequate for returning the piston without a spring.

So I take it that your set-up has done away with the spring entirely? Sorry if that was answered in the latter paragraph, it was a bit too technical for my young mind.

[ZapTheMad]

Nope, there is one spring in the system on the inlet valve. The only reason it is there is because it needs to make a quick positive seal against the weight of the trigger. It is also adjustable.

Lizard, read my auction description about international shipping.