Double Eagle M904g – Aka the Original Q Honey Badger

[ak2m4]

@Gaziel make sure you all gearparts 70 omega nub for that Macaron: https://www.ak2m4.co.uk/omega-nub-soft-70-gear-parts

 

[Stevobeavo]

Rubber bucking:

https://www.ak2m4.co.uk/maple-leaf-macaron-60-aeg

Inner barrel:

https://www.ak2m4.co.uk/zci-inner-barrel-229mm

I have these upgrades plus the ML omega nub.

I can lob .3 bbs pretty accurately 60/65m. 

I've recently put in a ML MR bucking but haven't played a game with the new bucking yet so cant comment on performance. 

Edit - one thing I have noticed now we're in colder weather is that I have feeding issues first thing on the morning. Om 99% sure it's the longer bucking lips on the ML so I'll be sanding/cutting them down a bit.

 

[Zinvoy]

Hello there, I need some help about a problem that I'm having with my M904, I recently have taken it apart, and after checking the shims and greasing the gearbox, I have put every together, and while checking my fire selector it's not working, I don't have a semi mode anymore, every time that I shoot it just does a burst of 2 shoots, and it does do same sound when you connect the battery, everytime that I press the trigger!

 

[RostokMcSpoons]

Have you nipped any of the wiring when putting it all back together perhaps?  It might be worth pulling it apart to check.

I haven't opened my gearbox up... is the mosfet optical?  If it is - any chance you've got grease on a sensor?

Have you tried resetting the mosfet?    IIRC it's simply done by putting the gun in Safe and holding the trigger for 5 seconds.

 

[Fatboy40]

is the mosfet optical?

It is, optical sensors for the trigger + selector + sector gear.

Maybe the selector plate is somehow in the wrong position, the sticker on the plate has come off / been damaged (a white sticker with black bars that the optical sensor detects), there's grease / gunge on the optical sensors or worst case the controller has become damaged 

 

[Stevobeavo]

You haven't accidentally put the gun in binary mode have you? 

 

[Zinvoy]

Have you nipped any of the wiring when putting it all back together perhaps?  It might be worth pulling it apart to check.

I haven't opened my gearbox up... is the mosfet optical?  If it is - any chance you've got grease on a sensor?

Have you tried resetting the mosfet?    IIRC it's simply done by putting the gun in Safe and holding the trigger for 5 seconds.

I have tried to reset the trigger, but that didn't work, it's continues to shoot a 2 round burst

It is, optical sensors for the trigger + selector + sector gear.

Maybe the selector plate is somehow in the wrong position, the sticker on the plate has come off / been damaged (a white sticker with black bars that the optical sensor detects), there's grease / gunge on the optical sensors or worst case the controller has become damaged 

By what I can see the sticker has some damage, I tried to straighten
that the best that I could, but it still has some marks in it.

You haven't accidentally put the gun in binary mode have you? 

No, it's really a 2 round burst them I press the trigger, the strange part about that is the sound, every time that I press the trigger I can hear the same sound them you connect the battery or try to config some firing mode.



View attachment 85498

 

[RostokMcSpoons]

I would say the beeping is either a loose connection being shaken by the vibration of the motor, or the sensor doesn't like what it's seeing and is giving you an error code diagnostic beep 

Edit:  for a G&G mosfet, but maybe they're common...

View attachment 85506

So somewhat backs up the idea the sticker on your sector gear is the issue

 

[Zinvoy]

I would say the beeping is either a loose connection being shaken by the vibration of the motor, or the sensor doesn't like what it's seeing and is giving you an error code diagnostic beep 

Edit:  for a G&G mosfet, but maybe they're common...

View attachment 85506

So somewhat backs up the idea the sticker on your sector gear is the issue

Yes that's what I'm thinking, I made the mistake of not seeing the sticker getting squished by the gearbox, now I have to see how I replace that.

 

[Fatboy40]

Luckily I've not yet had the need to take the selector plate off of any of the M900's I have / have access to, so I've not seen the sticker to confirm its patterning, but let's hope that they 100% mimicked GATE with their "Falcon" as you may be able to use this...

https://www.thecageairsoft.co.uk/gate-titan-v2-installation-kit/

 

[RostokMcSpoons]

I think I've seen mention in reviews that DE use a knock-off of the Gate Aster, but maybe they're talking in terms of the functionality rather than an actual clone of the hardware.

Edit:
Having seen this post in the Activity page, and realising the amount of useful information in my post is approximately zero, I've decided to add an interesting factoid that I found by chance today:

The flag of Hawaii contains a British Ensign, and is therefore the only flag of an American state to contain a foreign country's flag.
View attachment 85550

So much happier that this is now a slightly useful post

 

[Fatboy40]

It's more like the Titan V2, two separate PCB's that connect to each other, bottom one with sensors for the selector and sector gear and the top multiple sensors for the trigger and its sensitivity ?

 

[Zinvoy]

Luckily I've not yet had the need to take the selector plate off of any of the M900's I have / have access to, so I've not seen the sticker to confirm its patterning, but let's hope that they 100% mimicked GATE with their "Falcon" as you may be able to use this...

https://www.thecageairsoft.co.uk/gate-titan-v2-installation-kit/

Unfortunately, that kit is difficult to get where I live, I will continue to see what I can do about the problem, and if I fail, I will send the gearbox to someone with more knowledge, but any help here or advice is appreciated, thank you.





 

 

[Egon_247]

Sorry for the bump but has anyone managed to get a battery compartment extension for this yet? 

I don't want to damage my cables anymore. I've removed the spring loaded stock opening doodad which gives a bit more room but another 30-40mm would help.... 

 

[mightyjebus]

I put this one up on thingiverse ages ago:

https://www.thingiverse.com/thing:4352413

 

[RostokMcSpoons]

Alternatively buy a PTS EPS stock... £50 new, but occasionally show up for less used.
I'm sure there are plenty of clones available much cheaper too.

 

[Stevobeavo]

had a morning session last sunday and noticed at chrono my 904G was down to 0.95J from a constant 1.07J in all previous games (on stock spring still) and also after about 2 years of owning my 904G I thought it's best that I actually do some maintenance on the gun. 

Stripped the gun down

View attachment 96998

Although there was barely any grease left in the gearbox there wasn't much wear on the gears 

View attachment 97006

Checking the air seal, without the nozzle on it as pretty good but with the nozzle on it was actually pretty poor, nozzle has no o ring. So I've found my old specna arms cylinder head and nozzle with o-ring swapped them over and now I have a really good seal. 

View attachment 97007

View attachment 97008

Had to drill out the cylinder head holes by 0.5mm for it to fit on the lugs in the box. 

View attachment 97009

View attachment 97010

All lubed up with Waldo custom grease and reassembled. Ill be chronoing it in a few days to see what's it's shooting. But im certain it will be more due to the new nozzle sealing properly.

 

[ak2m4]

All lubed up with Waldo custom grease and reassembled. Ill be chronoing it in a few days to see what's it's shooting. But im certain it will be more due to the new nozzle sealing properly.

Be interesting to see what you get, I've done several nozzle tests recently, with o-rings against those without, good seal nozzle at retracted and extended point vs one with no seal and the fps was always the same.  A lot of other variables of course and no 2 setups are ever the same.  Let us know how you get on.

 

[Fatboy40]

@Stevobeavo  About 6 months or so into owning my DE M904E I just wanted to start tinkering with it, nothing big at that point (it's radically different from stock now) but at least fully disassembling it and rebuilding it. I got an extra 5 to 8 FPS on 0.20g just from carefully cleaning an re-greasing it with Super Lube.

The biggest gains I got though were from...

# Replacing the Spring: The three DE M900's I have were all UK spec for power from the retailer, but the spring in each one was totally different from the others in strength, length and two were progressive and one was linear. Using well made springs gave substantial power gains, with no loss over time, and consistency when swapping them around.

# Maxx Model M4A-PRO and Nozzle: In my DMR, a DE M908A at 420 FPS on 0.20g, I recently installed a Maxx Model M4A-PRO and their 21.25mm Nozzle, and had a big FPS gain (I noted what it was but can't find it, something like 10 to 14 FPS). Was it the hop unit, was it the nozzle, both together?

 

[Stevobeavo]

Be interesting to see what you get, I've done several nozzle tests recently, with o-rings against those without, good seal nozzle at retracted and extended point vs one with no seal and the fps was always the same.  A lot of other variables of course and no 2 setups are ever the same.  Let us know how you get on.

That's interesting, everywhere you read says to replace with one with a o-ring.  I'm only just getting into teching, that's why I got one of your ZCI gearboxes last month to play with in my dead specna arms.

Once I test I'll put the readings up for you. 

@StevobeavoReplacing the Spring: The three DE M900's I have were all UK spec for power from the retailer, but the spring in each one was totally different from the others in strength, length and two were progressive and one was linear. Using well made springs gave substantial power gains, with no loss over time, and consistency when swapping them around.

# Maxx Model M4A-PRO and Nozzle: In my DMR, a DE M908A at 420 FPS on 0.20g, I recently installed a Maxx Model M4A-PRO and their 21.25mm Nozzle, and had a big FPS gain (I noted what it was but can't find it, something like 10 to 14 FPS). Was it the hop unit, was it the nozzle, both together?

I definitely need to get a few decent springs for my DE guns, just never got round to it yet. 

How did you turn yours into a DMR, cover the full auto optical sensor or stop the selector plate moving that far?