Evanix Experience with Evanix AR22 Hunting Master?

[moinsen]

I just recently purchased a new regulated Evanix AR22 Hunting Master in .25 cal. Unfortunately the gun comes with no helpful manual and on the internet info is also spare.
Maybe its a good idea for Evanix greenhorns (Like me ) to have some preliminary information to get a better understanding of the gun.
Out of the box the gun is quite nice looking and operable, so no technical defects. Ran also about hundred shots through it.
Here my questions:

1. The gun comes as a regulated Version, but there is no real difference between the pressure of the air cylinder and the regulator pressure. Filling the air gun up to 230 bar leads to 220-230 bars on regulator side. There is a brass screw under the regulator, turning it inwards decreases pressure but the regulator doesn't refill after the shot. When backing out the screw on its original position the limit is back to about 220-230 bars, which turn the gun basically in a unregulated version (max fill pressure 230 bar). I heard for .22 the pressure is set fixed at 180 bars and cannot be changed. So is it now possible to change the regulator pressure and what are the proper steps to set it to desired pressure? Does it have to be degassed before (e.g. like FX Impact ) decreasing the pressure?

2. How can you remove the barrel? There is one set screw holding it at the mounting rail, but the barrel wont butch. I suspect its threaded into the action but I dont want to mess around without knowing about it for sure.

3. Is it possible to drill the 1cm deep chambers of the magazine a little bit out? (About 2 to 3 mm) to fit slightly longer slugs/pellets into it? Or does it affect the performance since pellets are fired directly from the magazine.

4. If its not possible to regulate the pressure has somebody tried to fit a stronger spring or add more weights to the hammer to increase fps slightly? The first shot on 230 bars is about 40% slower then follow up shots, which is quite annoying to get consistent results.

Feel free to answer some or all questions and add more tips for handling/tuning.

 

[Airgun Al]

Im not any help, however my 2nd PCP ever, was a unregulated .22 Evanix AR6 as I recall, about 20 years ago.
Accurate, inexpensive, powerful and well built it was, however, it was so loud, one might as well be shooting a powder burner!
I did not own it very long, and never disassembled it.

 

[moinsen]

Yes noise level is still quite high. First airgun I need ear protection for . I was originally looking for an unregulated version, but couldnt find any in .25, so I decided to get the regulated one. Its a shame for such a well made and simple rifle to not have much information about it. Ofc if anybody owns a AR6 or AR6K please also share your experience since the AR22 is technically not to different from this models.

 

[moinsen]

At least to 4. I have some answers now. The lower fps at the first shot was caused by double feed. Its very important that especially slugs sit tightly in the magazine. If those sit lose they might fall right into the barrel when pointing the gun downwards. I like to spin the magazine a few clicks to check if its rotating properly before shooting that's how it happened. Regarding the hammer, its very easy to add some weight to it (I used metal washers), increase in fps is about 10 to 20. Didn't touched the spring yet, cause I have no idea how to put it back together after replacement with a stronger one.

I noticed lately a strange mechanical "click" when refilling the air cylinder in the moment the pump builds up pressure above actual air reservoir pressure (filling pressure). I suspect that's the valve opening from filling port to the cylinder, but its pretty loud. Did somebody experienced this with other airguns? My Impact makes no noise at all when refilling.

 

[Airgun Al]

At least to 4. I have some answers now. The lower fps at the first shot was caused by double feed. Its very important that especially slugs sit tightly in the magazine. If those sit lose they might fall right into the barrel when pointing the gun downwards. I like to spin the magazine a few clicks to check if its rotating properly before shooting that's how it happened. Regarding the hammer, its very easy to add some weight to it (I used metal washers), increase in fps is about 10 to 20. Didn't touched the spring yet, cause I have no idea how to put it back together after replacement with a stronger one.

I noticed lately a strange mechanical "click" when refilling the air cylinder in the moment the pump builds up pressure above actual air reservoir pressure (filling pressure). I suspect that's the valve opening from filling port to the cylinder, but its pretty loud. Did somebody experienced this with other airguns? My Impact makes no noise at all when refilling.

I do not ever recall my Evanix being loud when filling.
It was however, very loud when fired.
However, it was only my 2nd pcp at the time, and that was so many years ago.

 

[Dr. Kralenstein]

I had an ar6k briefly. Non regulated.

The barrel does thread into the receiver. Remove the set screw, and use a strap wrench or vise grips with some leather between the barrel and teeth. Counter clockwise should come out.

I liked the design and double/single action, but the barrel being low in the breech killed it for me. I wanted to make a shroud for it to keep the length down vs using a moderator.

 

[Racing]

I own an AR-6 and as i work on guns.. might be able to hand a bit of insight. If there´s anything specific, just ask.
Yes.
Barrel is threaded to the main block via a M12*1 thread. This is also where you set end gap. Ie; turn the barrel in until the cylinder can´t be rotated by hand anymore and then just a smidge out from there.
Both the cylinder and end of the barrel are cut to handle that. Set barrel set screw.

Need be they can of course be cut 1/2"-20 UNF out front and indeed a LDC/moderator will tame the thing right down. Any even in the slightest capable machine shop will be able to handle that.

Trigger unit/assy isn´t really to be fooled with (at least on the earlier versions). Built on two sheet metal stampings that are riveted together. This can be overcome by careful drilling of said rivets using a 2.5mm drill bit then to be threaded M3 for a countersunk allen screw. From memory (been a while) there´s all in all 5 such rivet "posts" to the unit.
Hammer spring is rather short n stiff. Spring can of course be replaced as well but as the unit hands an easy 80J/59fpe in non reg version without breaking a sweat and in turn with a few weights applied to the hole in the hammer can be had to run beyond 100J/73fpe... i kind of fail to see the point really - at least from a practical point of view.
FWIW i make weights from brass.

Barrel is on a full 650mm, which will suffice and then some. The ones i´ve seen have all lacked choke and have been on a 1:18 twist (in 22cal at least)

On that regulator in turn.
Sounds to be like it´s not doing what it should. Dunno where you´re at as far as having bought the thing, but if replacing is out try looking someone up that knows how a regulator works, then pick the thing apart and have him check the reg out.
They´re not overly complex to the build so...

 

[moinsen]

Racing, thank you for your reply! I have seen your post in another forum that's how I got on the idea with the hammer weights.
The trigger unit is still assembled in the old manner. I got a power upgrade kit consisting of a new spring and valve housing. Maybe I will just install the new valve and not mess around with the spring (yet). What tools did you used to unscrew the valve holding the pin?

Regarding the Regulator I'm not sure if I want to send it back. I found only one offer in Europe in .25 cal and they appear out of stock everywhere else. The seller wrote me (after two weeks + two e-mails) to send it back, but I'm not convinced that they are able to fix it.
I think I will take a look at it myself just out of curiosity how it looks under the hood.

Here is a photo from the regulator. (Borrowed from another thread , mine is all brass, but same setup)

I think the regulator can be unscrewed somehow by turning the inner or outer steel parts. Not sure how yet.


Do you know how to degas the plenum and the air cylinder? There are two Allen screws (one before and after the pressure gauge) but none on the cylinder side.

 

[Emu]

Im not any help, however my 2nd PCP ever, was a unregulated .22 Evanix AR6 as I recall, about 20 years ago.
Accurate, inexpensive, powerful and well built it was, however, it was so loud, one might as well be shooting a powder burner!
I did not own it very long, and never disassembled it.

One exactly like yours was my first PCP many years ago. Still working perfectly.