Reximex NYX 25cal

[Racing]

All to aware that to our US based friends these guns are... harder to come by..
No matter.
Reximex is a young Turkish manufacturer under the same ownership as Kral. Just that, from what i´ve been informed, the crew of Reximex is way younger too AND AFAIK the Reximex brand is thought to be, and more so become, an upscale version of the two brands.

I´ve had the various Reximex offerings through my hands by now with few exceptions where then the Meta Premium (another thread) and the NYX seems to be their latest brain childs.

Right off, as a Turkish manufacturer Reximex no doubt strives forward in a WAY more noteworthy manner than ANY of the others. With the Meta Premium and NYX in turn a few LEAPS has been done from a design and build quality aspect.
Fit n finish of the parts is now bar none, and albeit both models truly lacks out in "thinking" more than anything here n there it in no way detracts from what the builds are.

As much as the Meta Premium has come to impress me.. the NYX is sure a different creature.

The use of an AR "buffer tube" setup and in turn grip i guess to a degree strikes the tone here and when we read up on how they (Reximex) headline this piece..
Looking under it´s skin, they´ve lost me. They market this as a PCP "to be comfortable with those longer shots".
Well, whatever.
The Meta Premium sports a 90cc plenum and 700mm barrel on 1:16 right out of the box. The NYX replies with a short of 20cc plenum and 480mm tube?
Longer shots?
Say wut?

Yeah.



As you can obviously see the thing is rather "bare" as a build. Fit n finish though.. right up there with the big boys. No argument. Regulated gun, of course, and reg pressure is set by removing the bottle - which grants access to the adjustment screw.
I´ve got this one set to 2500psi approx (170bar)



As noted elsewhere, the one thing i feel n believe Reximex needs to alter (and that in a hurry) is the use of a "Reximex standard" mag. As much as i can appreciate what they´re getting at i believe they´re now missing the target entirely cause these mags are simply to shallow to take appreciable weight pills.
As we see PCP tech evolve it basically points one direction and one direction only.
Towards higher n higher muzzle energies, and the thing is that the end consumer is starting to get used to this. Irony of it, also touched on elsewhere, is that Reximex and Kral are under the same owners right and the Kral mags are rather specific 3mm deeper..
In other words, all they need to do is knock on the door at Kral and ask..
For the 25´s i´d say we´re within reason but for the 22´s.. just forget about it. The 22´s WILL be power limited due not heavy pills enough can be fitted, period.
Mags in themselves though work very well and are nothing novel by any measure. All plastic but.. just works i guess.



On a whole the entire piece is aluminium. Now, i´ve drilled and cut into it and.. not the cheapest stuff at least. Tell ya that much. Both cuts and reams nicely. Charging handle will stand up to loads and i presume it´s made out of the same material.



TBH i don´t know what Reximex set out to with either the Meta or the now NYX. If it´s from being traditional on it or.. But suffice it to say that they both run on approx 4.5mm transfers.
For the NYX with its limited plenum volume and so on.. sure. Then again, the ever present "power adjuster" (which are on basically all Kral guns too) this time is set on a 9mm diameter body.
As far as the diameter of that power adjuster it´s like they´ve by now been all OVER the map! Strange.. In turn the actual throw of that adjuster..limited.

Anyways.
Funny enough the thing runs a rather heavy hammer and in turn meek hammer spring. What´s more this is not adjustable by any measure stock, for whatever reason.. i have no idea.
Modifying to make it adjustable is literally a piece of cake cause all you need to do is drill a 5mm hole in the spring end cap and thread that M6. Then shove a washer that fits in there to make the new screw be able to act on the spring.
Done deal, and as you have the piece apart it´s a 5 minute job. Why Reximex opted NOT to from the getgo..? No friggin idea.



On that note, once again (as with the Meta) we see this downright INSANE diffusor for the shroud. Or.. maybe someone just correct me on the how´s and why´s of it cause i for one sure don´t get it.
What´s worse is that it wasn´t really torq´d down vs the barrel and as i did it turned out that the at the main block end threaded shroud tube simply became 3mm to long.
A very simply issue to remedy but.. should you, as the end user, need to?

I chalk stuff like this up to growing pains cause mark my words above.. this IS a very high quality build. Which makes it even more peculiar how situations like this come to, at all.?
A lathe or a common file, whatever.. 3mm needs to come off. That simple and that done the shroud both works and functions fine.
There´s other plans upcoming though..




Will it shoot? In a word yes. Now, this a full clip at a mere 30m but i´ve since stretched that out to 80m with results about on par. So yes. Exit speeds measured with the FX brick tells the other end of it, and indeed both ES and SD are very close.



Yes. I know. About "raping" the poor thing but for what i´ve got in mind there´s no other way. So that there is 120cc´s worth of plenum, which will make it all come to approx 140 total. More than i´ll ever need..



Nope. Sure won´t win any beauty contests, but i could care less. Performance is the name of the game here.
Actually giving thought to making that cylinder come to a rest in vertical. I´ll snap a picture or two.. then you be the judge.



Since firing the thing first time i felt that shutter time was on the big side. Indeed, as i finally came to pick the remains apart it turns out the hammer comes in at a whopping 75 grams, simply being a cylindrical piece of steel. I presume the idea here was for a heavy hammer to hand at least SOME dwell using that very lazy stock hammer spring.
But again..



Don´t need that where we´re going. So hogged that out using a 12mm endmill. Made the unit settle at 47grams.. That made the threads for the "cocking pin" come up short, why i turned an aluminium cylinder i sent in there and then drilled and tapped that M5 as an extention of the already present threaded hole for said pin.

Transfers?
Yes, these have been upped and as such BEFORE adding the plenum and fooling around with the hammer and so forth i had the thing spitting 34´s out at the tune of just a tad over 80J.
Just got done with the hammer and so forth late tonight so.. will have to get back to you on what that gives.

So. Seeing that? Kral has since a short while back come to market their 700mm barrels on 1:16 here in Europe as a separate spare. So i´ve ordered a couple of them in 25 and in turn 22.
One of them 25 tubes will end up on this NYX.. and we´ll take it from there.

One neat feature, have to say, is that the entire trigger group is one stand alone unit. Only thing "sticking out" of said unit is a pair of springs, where they can of course be replaced or altered at will.
The trigger can be adjusted to be juuuuuust about a "match trigger" and i have no complaints what so ever as far as the trigger.

Fact is, it´s rather little i have to say that´s downright negative for either the NYX or the Meta. If Reximex can just iron out a few.. shall we call it "bumps" these will be downright INSANE value for money.
The Meta Premium especially so.

As you can gather lads then...
..to be continued.

[CK]

Hello Racer,

I'm in the US and the Nyx sure looks like what Benjamin imports as its Gunnar. I like mine (Gunnar), the only complaint I had was with the castle nut. Mine became loose and I was unable to get my castle nut wrench to mate with the notches as the factory nut has 10 notches, so a standard 4-notch wrench would not fit. I replaced it with a standard 4-notch with a US made steel castle nut now the stock tube is firm again.

How did you remove the trigger group? It looks like I would need to first remove the safety, and then there appears be a cross-screw that would allow the trigger group to pull out.

Thank you,
Chris

[Racing]

Hi Chris.
Welp.
I´m here to tell you that the Reximex NYX IS the Benjamin Gunnar - with a few differences them apart. Indeed the Gunnar IS what Reximex built for Benjamin and done deal.

The trigger group on the NYX at least is a matter of two countersunk allen screws into the main block and threads to the trigger assembly. Unbolt those and out the trigger group comes.
If it´s any different on the Gunnar, no idea.
Need be snap a few pics and we´ll take it from there.



Notice how the trigger group lifts out as one complete unit in this pic. What comes out "on the side" is the return spring, that acts vs the "floor" for the trigger group on the main block. Just make sure you keep check of that spring.. a smaller jobbie.. and you´ll be fine.

That being said i´ve come to spend yet a few hrs on this piece, and have started to come full circle i guess. I repositioned the 120cc plenum to enter via the port used for the reg pressure gauge, making sure to open up the opening on the block to cater to flow, and in turn i´ve modified the valve to run on a PEEK poppet and in turn 2mm hardened steel shank/spindle.
Difference is staggering..



Now on a rather lazy HS the thing spits 34´s out at the tune of approx 100J at the drop of a hat. In short.. this is exactly what the NYX/Gunnar needs IMO and it to the letter tranforms the gun.
Mark that neither the plenum nor the 2mm shank setup for the poppet HAS to be to cater to higher performance. It is instead a matter of increased SPAN on the gun as it can just as well be used with a very lazy HS for a gun so easy to cock it becomes an absolute joke.

Thing is.
If you add it up the mods pulled, the added plenum apart, are rather simple really. The 2mm spindle.. no worries, turned an insert on 5.06mm diameter which handed me a press fit vs the stock piece.. and then just shoved a 2mm H7 reamer through there.



So. Now on a more "normal" diffusor a´la FX and in turn a rather active shroud setup. Also notice the slightly shorter bottle used. 480cc´s worth.



Yup. Opened up that port that houses the reg pressure gauge stock. Works rather well TBH. Reg pressure gauge now resides on the side of the block, very close to the bottle pressure one.



Uhu. Might look a tad unorthodox but to be honest you fairly notice handling the gun, and FOR a difference it makes! 

Now for the "little things" on this unit. But.. we´re getting there. Btw awaiting delivery of barrels from Turkey direct.

Btw. Noticed as i came to push my Meta Premium. In 25cal the stock mags will take 42´s at the most. Heavier pills = cutting the acrylic lid back on its inside on the lathe.
Dunno what that´d bring yet, need to order some 46 grain pills n check.

[CK]

Thank you Jesper!

I've always been more of a carpenter than a machinist, but I do enjoy seeing what can be done to these guns and you are definitely expanding the gun's potential.

[Eml90]

Hello, have you sold your nex?

[CK]

@Racing
Hi Jesper, I had to take apart my Gunnar to dislodge some stuck pellets that fell into the hammer well and blocked the valve stem. I would like to pull the valve if I can to thoroughly clean.  I cannot push the valve out from the hammer side.  Am I missing a step?  I have the regulator/gauge/fill port block off (thank God I was able to get a stuck screw out by drilling the head off).

[Racing]

That there in the picture isn´t the valve or poppet, it is a block off that´s held in place by the rear stock and a plate.
That that thing is stuck in there, only thing keeping it in is that it carries an o-ring to seal the thing off.
Grab it with a pair of decent pliers and wiggle it out of there.

That out you´ll get to the "juicy stuff" 

[CK]

@Racing
Thank you for the help Jesper.  It pulled out with pliers as you suggested. I am all cleaned out, just pressurized it half way to sit for a leak test.  I did take the opportunity to swap locations of the foster fill and tank gauge.

Thank you again for the assistance because Reximez has yet to post a parts diagram.

Best regards,
Chris

[Racing]

Hey man, just hollar. 

[Racing]

Time for an update on this one.
It eventually came full circle.



As can be read above quite a few mods have been pulled, the thing just came at a rest on the backburner for various reasons. Then.. recently, let´s get this done.
Said n done.



Yep. A 70cc stand alone plenum. Correct. Connects to the main receiver block via a 10mm dia tube and the thing just plain works. Shroud, as can be read above, got shortened and it still fails me with that stock diffusor "solution" of Reximex cause the that much shorter shroud sure makes it way more viable with an ample LDC out front, which.. makes the thing come together.

As it now seals well, like all over, the thing is very silent in operation. Due porting dimensions i´ve got reg pressure set rather low and she still delivers at will no doubt.
Hits hard and is accurate, what´s there more to ask for?

So.
For those so inclined, these jobs can be pulled just as well on the Benjamin Gunnar -which i know quite a few find a tad anemic. Uhu, even on the stock length barrel the thing will hand the goods.