Mrodair Airmax MKll

Mrodair Airmax MKll

Joined: November 12th, 2016, 1:28 am

September 10th, 2017, 7:12 pm #1

Can anybody tell me how to get the regulator out of the Airmax MKll pistol. I think Huma is making one for this pistol, so I need to find out how to remove move the one that's in it.
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Joined: March 8th, 2017, 3:04 pm

September 10th, 2017, 7:44 pm #2

Looking at the exploded view diagram below you'd need to remove the reservoir to get to parts 21-27 to disassemble the regulator and access those Belleville spring washers and plug from the rear of the assembly (ie where you adjust it with the allen wrench normally via the external access). Will be interesting to see what they do for the regulator, maybe replacing the 21-31 assembly all together or something.

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Joined: December 30th, 2008, 6:16 pm

September 10th, 2017, 7:54 pm #3

Can anybody tell me how to get the regulator out of the Airmax MKll pistol. I think Huma is making one for this pistol, so I need to find out how to remove move the one that's in it.
replace a functional regulator with a Huma Regulator ($130+S&H)... in a pistol (with other issues) barely worth $150 used?
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Joined: July 13th, 2009, 2:26 am

September 10th, 2017, 10:25 pm #4

My AirMax is shooting fine, holding air, accurate, and packs a punch.

I'm curious to know if there are really any issues to be addressed. Mine works fine! It's a neat, low cost, powerful little pistol.
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Joined: November 12th, 2016, 1:28 am

September 10th, 2017, 11:21 pm #5

Looking at the exploded view diagram below you'd need to remove the reservoir to get to parts 21-27 to disassemble the regulator and access those Belleville spring washers and plug from the rear of the assembly (ie where you adjust it with the allen wrench normally via the external access). Will be interesting to see what they do for the regulator, maybe replacing the 21-31 assembly all together or something.

My model is a little different than the image your showing. Part 26 on my pistol doesn't have the 4 screws that mounts it to the block. How do I remove it?
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Joined: December 30th, 2008, 6:16 pm

September 11th, 2017, 12:00 am #6

My AirMax is shooting fine, holding air, accurate, and packs a punch.

I'm curious to know if there are really any issues to be addressed. Mine works fine! It's a neat, low cost, powerful little pistol.
I have the MKI version of this pistol. Out of the box, it has a couple glaring design problems (in addition to the erratic regulator):

1) A hard, difficult to adjust trigger, a well-known issue. After stoning the parts, the only thing that made it more predictable was generous use of lube, which needs periodic reapplication. There is little adjustment range, regardless.

2) A rotating barrel, completely unattached to the breech block. Without adding index marks for reassembly, this non-indexed barrel will take a different set -- and shoot to a different POI -- whenever the shroud becomes loose, either with vibration, or following a shroud cleaning. https://www.youtube.com/watch?v=YvwZClbLE_0 You will find yourself drilling and tapping set screw holes in the breech to fix the barrel permanently, but then it's resale value plummets.

3) It is well known that the cheap, Chinese o-rings are worthless, and will need replacement.
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Joined: November 28th, 2010, 2:13 pm

September 11th, 2017, 12:42 am #7

Looking at the exploded view diagram below you'd need to remove the reservoir to get to parts 21-27 to disassemble the regulator and access those Belleville spring washers and plug from the rear of the assembly (ie where you adjust it with the allen wrench normally via the external access). Will be interesting to see what they do for the regulator, maybe replacing the 21-31 assembly all together or something.

It's regulated, has good shot count, good power, and great accuracy. We shoot golf balls at 55 yards all day long. True, you can't make the trigger like a Steyr, but it's pretty decent. I think this is a helluva good pistol for the money.
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Joined: March 8th, 2017, 3:04 pm

September 11th, 2017, 3:28 am #8

My model is a little different than the image your showing. Part 26 on my pistol doesn't have the 4 screws that mounts it to the block. How do I remove it?
And I can tell you right now as a fellow mk2 .22 owner that it most definitely does have the 4 screws holding it into the receiver. It may be that the end piece of the reservoir is still attached on it (part 38), which unscrews from it. If you're still having some trouble with it I can probably take a few pictures tomorrow showing the disassembly, just need to figure out a different image host since PB became a royal PIA.

Edit: there's also this cad rendering of the regulator setup for those parts on the mk2 page over at mrodair

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Joined: November 12th, 2016, 1:28 am

September 11th, 2017, 7:30 am #9

I have the MKI version of this pistol. Out of the box, it has a couple glaring design problems (in addition to the erratic regulator):

1) A hard, difficult to adjust trigger, a well-known issue. After stoning the parts, the only thing that made it more predictable was generous use of lube, which needs periodic reapplication. There is little adjustment range, regardless.

2) A rotating barrel, completely unattached to the breech block. Without adding index marks for reassembly, this non-indexed barrel will take a different set -- and shoot to a different POI -- whenever the shroud becomes loose, either with vibration, or following a shroud cleaning. https://www.youtube.com/watch?v=YvwZClbLE_0 You will find yourself drilling and tapping set screw holes in the breech to fix the barrel permanently, but then it's resale value plummets.

3) It is well known that the cheap, Chinese o-rings are worthless, and will need replacement.
All those things you said are true, but my particular pistol is very accurate and I have the trigger set to a light pull. These pistols are very well built for accuracy. The orings may be cheap, but they can be replaced. Iv'e put over a thousand rounds through mine and haven't had any problems. Wanting to add a huma regulator to my pistol is me tinkering. I think it would get better shot count and less change in velocity. I don't consider a couple of hundred dollars, for a very accurate air pisol much money. Adding a little more for a huma regulator isn't going to break my bank. I guess i'm saying adding attachments to my guns is just fun for me.

>>Disallowed text removed per RULE#13.<
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Joined: July 13th, 2009, 2:26 am

September 11th, 2017, 12:26 pm #10

Ditto...that's why it's called a "Hobby"
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