What really is an MPA-3?

[c0rpse]

I understand that we modify the MPA-3 so it basically acts as a pneumatic cylinder/ram to actuate the sear. I want to know what the MPA-3 really is and what it was made for. Unlike electronics, these manufacturers (SP?) give us no type of spec sheet that explains what it does.

[wjr]

I'm pretty sure that it is used in a variety of applicataions. It's a basic pneumatic device, just miniature, so it can be used for lots of things.

[c0rpse]

Basic pneumatic device doesn't get any vaguer (is that even a word?) Can we get an internal diagram or something please?

[wjr]

Oh. So you're just curious to see how it works?

[the electrician]

no, it is a valve actuator. it screws onto the end of a mechanical valve. it turns any compatible mechanical valve into an air piloted, or air signal controlled valve.

MPA-3 Mechanical Pilot Actuator

[c0rpse]

Ok that, makes perfect sense, so we have to put the riv nut on it, so it becomes a ram. And we use a modified MPA-3 over a regular pneumatic ram because of cost/size?

[PnueMagger]

you dont have to modify it. I just drop a lukes piston in and use set screws to hold it into place.

Lukes MPA-3 ram = way easier than a rivnut.

[c0rpse]

Can you send me a link to it? I dont see it on his site.

[wjr]

http://www.lukescustoms.com/page0017.htm

[c0rpse]

Thanks, and they work well? Are they adustable in length?