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Discussion Starter · #1 ·
Hi

So I struck a good deal on a G&G GR25.

I've searched on many forums and pages for the best upgrades but I can't find a decent or concrete list.

Any owners of the GR25 with a good preformance DMR?

At the moment the gun is back to stock but I got a few parts with it:

- G&P M120 High Speed Motor - Long Type
- Burst wizard 3 mosfet

The motor is probably not the one I want in this but I tought I would just mention it ;)


Thanks in advance
 

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I doubt you will find a list for it. They are not the most desirable platform to build off.

Aside from barrel and bucking upgrades, hopup chamber is not upgradeable. No after market chambers for it.

Gearbox wise, the only thing going for it is that its a normal version 2 gearbox. The air nozzle is absurdly long.

A STS will not work on it either.

Parts wise, there are loads of options. Though I am not a fan of the burst wizard, but to each their own. I wouldn't use a G&P motor. They are ok not well suited for a dmr, but there are better alternatives.

How comfortable are you with AEG teching?
 

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Discussion Starter · #5 ·
I doubt you will find a list for it. They are not the most desirable platform to build off.

Aside from barrel and bucking upgrades, hopup chamber is not upgradeable. No after market chambers for it.

Gearbox wise, the only thing going for it is that its a normal version 2 gearbox. The air nozzle is absurdly long.

A STS will not work on it either.

Parts wise, there are loads of options. Though I am not a fan of the burst wizard, but to each their own. I wouldn't use a G&P motor. They are ok not well suited for a dmr, but there are better alternatives.

How comfortable are you with AEG teching?
I heard a lot of people say that about the GR25: /
I would have liked to buy a newer DMR platform but just couldn't decline the deal :)

The burst wizard is mainly to get a 2 second delay on it and since it came with it I just said F'it let's use that. What could be a better option?

For the technical part of AEG, I am quite comfortable with it.
i mainly worked on M4 platforms though with a standard V2 gearbox.
 

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The gr25, just treat it like a regular aeg m4. Keep the oem hopup & nozzle and tinker away on everything else. Don’t bother with some absurdly long inner barrel. 400mm’ish tops imho...

I have one I’ve been working on (not touched it in months though) that will be powered by a wolverine reaper, powered by propane if I get it working right lol
 

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-0.4gm bb's
-6.01mm x 355-400mm (Like cetane said)
-SHS Plastic Piston with full metal teeth
-SHS high Torque motor
-M160 (When new this may be a little higher than what you want but after a 1000 shots it will most likely come down. You can always cut it down if needed)
-Mosfet-You can get a copy of the Burst Wizzard 3 off of Aliexpress for about half the price. They seem to work well. It has a sniper delay (0.2 sec increments. So it can go as long as you want it to go) and can be wired fully into your trigger contacts as a proper mosfet should be or if you want you can use plug it in and the sniper delay will still work. (PS. I am pretty sure the BW3 has more features than the BW4)
-11.1v lipo
-You can stick with the normal gears but they will be under a lot of stress and so will the motor. Everything will be working hard. I would advise using a ratio of 100:200 (I think this is a ratio of about 24:1). The problem with 100:200 gears is that they are all helical gears which I hate. They can be a pain shim.

You will most likely find that gearbox will not last too long (If you are lucky, it may). The front of the GB will most likely break off. Unlike a normal V2 or M4, you cannot use a mag well brace to strengthen it.
 

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Gonna beat a dead horse, you will break the front of the gearbox off. Not a matter of if, but when. Even with doing all the mods in the book, like radiusing, its going to die.

For mosfets I typically use gate products as they work with microswitches. Merf, Warfet, Titan.
 
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