I heard using an 11.1v battery with nylon gears will strip the gears is a fallacy, that it won’t strip the gears
True or false?
I have always run 11.1v and only ever stripped the nylon gears in an early MP7. Only other blaster I’ve stripped gears in was a metal geared ACR.
Interesting, a lot of other information Ive come across was saying 11.1v batteries in nylon gears, or blasters designed for 7.4v batteries causes excessive wear on the nylon gears and other internals…
Hmm, tactics to sway people into buying more expensive, higher powered blasters perhaps?
MY TWO CENTS WORTH
Bad shimming strips nylon gears…
Too heavy piston springs will too…
Worn or broken gear bushes will too…
Springs breaking and getting caught up will too…
Too strong a motor will too…
A well shimmed nylon gearbox should handle 11.1v no problem provided the gears are decent quality nylon and t’s not trying to rack back an m120+ spring.
I’ve got several nylon geared boxes with M100s in them in that have been happily banging away for a long time. They’re correctly shimmed and regularly lubed.
That tech’s passing on second hand opinion, which doesn’t sound like it’s based on any personal experience. 
That makes sense, definitely a lot broader explanation than I was given at the store.
He wanted to put an 11.1v battery in the QBZ 95 you donated, I asked to stick with the 7.4v as it was for the young fella and he’d spam triggered his hk416 until the trigger stopped responding so I figured best to play it safe and stick to the 7.4v. it was at that point he kind of got the shits and said 11.1v stripping nylon gears was a fallacy.
I just wanted it to last as long as possible as I don’t know better myself so playing it safe was the best option in my opinion
In any case, I better not name who it was then 
I wouldn’t run an 11.1v on that early generation QBZ… it’s only a 370 motor from memory.
If you really like the platform, the later versions with the better boxes and 460 short motors in them should handle 11.1v okay.
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Yeah I figured with it being an early version of it, it was best not to push my luck with an 11.1v battery.
Cheers
He’s not wrong… but not right either.
Some nylon geared blasters I would never recommend running 11.1v. like wells nylon gears is a big no from me. Jin Ming LeHui JingJi… send it!
7.4v is “retailer safe”. Remember they want you to pay for repairs if it needs it so it ideally for them needs to last the warranty period. And we all know how well a stock box is shimmed!
As @Friendly_Fire stated already, good nylon gears like Jin Ming LeHui and JingJi, will handle the 11.1v and a reasonable spring fine IF the shimming is all right. Big if though in reality for a stock blaster.
In all my years I have only had one gearbox I didn’t adjust the shimming on. One out of thousands!
The catch with 11.1v on nylon gears is if anything goes wrong and the gears come under sudden load (jammed gel and pme etc) they bend instantly and are stuffed.
With a 7.4v there is more time to hear the issue and stop pulling the trigger, more time for the piston to get home between cycles… and if there is a jam or something stopping the gears turning there is a better chance it will lock up and not be able to power through it. So it is an easier and cheaper fix. For many cheaper and reliable is a good thing…
But we all run 11.1v! I only have 1 blaster built around 7.4v, and it will run 11.1v, but it’s on the ragged edge of pme with 11v, and turns out 24rps on a 7v is not too bad, so kept with that.
That said, I would stick to 7v on the old qbz. No point risking something that might be hard to get parts for, best to keep older rarer pieces in working order.
What he said.
Overspring shit goes bung and fucks everything. Why I always stick to the 1,18mm spring pumps 340 if you got everything else right . Nozzle, booom o ring a ding.
Standard Nato, softly sprung but with some punch easier on the gears and we don’t have tears.
There always plan b and hammer time out with the 9". Ive got new material 
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You and that 9"… 
Thank Christ you’re not a surgeon…
NURSE : “Doctor, we need to remove this man’s appendix immediately!”
MAIPHUT : “Nurse, hand me the 9” grinder… STAT!"
haha is it broken…will be in a minute