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Discussion Starter · #1 · (Edited)
Alrighty folks, base platform is an Classic army ars3-12 M4
Internals im working with
9mm Bearings
21:1 Ratio gears
Mosfet
"bore up kit"(pre installed idk what this means really)
looks like GB is pre raduised from factory

i replaced the stock barrel with an 407mm 6.03 madbull
i replaced the hop unit with the classic army blue rotary one they put in the nemesis line.
also flat hopped it with the stock bucking (gng green coming in soon)
stock gun is sitting about 400ish fps

i get overspin on semi/full auto with 11.1 but perfect with 7.4, both 20c

main questions is:
do i need a bigger barrel for the bore up kit? i used .3 .32s or higher
should i mess with r-hop if my field dmr limits are 450
need a motor recommendation, thinking shs high torque or jg blue.
Gears, shs 18:1 or should i leave the stocks ones in
Bushings?




overall goal with the build is
semi performace(dont use full auto much)
range
trigger response(because while i dont use full auto alot i do spam semi in controlled bursts)
 

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Honestly? You pretty much are doing it bang on. What's performance like on it now? Effective range, accuracy, etc?
 

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should I ....... with r-hop if my field dmr limits are 450
Firstly, edit your post and keep the bad language for other forums. A lot of kids read this forum and so it should be kept up to a high standard.

Secondly, I may be able to help with your build.
A bore up kit does not really make a difference to cylinder volume. The increase is so minor that I would say it is pointless. So, what I am about to say is for a standard cylinder volume and you could still do the same with your rifle as the bore up kit is not really any different.
For 0.3-0.32gm bb's I use an inner barrel of 6.01x270mm. If you go longer you will find that the 0.32gm bb will be just traveling down the inner barrel on it's own energy. So the cylinder would have reached the end of it's cycle and the bb then has to continue through the rest of the inner barrel by itself. In my personal opinion, if you use a shorter barrel that matches the bb weight, I think that this makes the rifle more accurate and it can also help with range as you are getting the maximum energy out of the heavy bb.
Also, another big advantage to having a short inner barrel is that you can put on a long silencer and this can soak up a lot of the sound.
With the shorter inner barrel you will need a bigger spring and in turn a bigger motor. So the JG blue top (high torque) or the SHS is good. You may also want an 11.1v to run the bigger spring and with this bigger spring you should not get overspin.
 

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Discussion Starter · #4 ·
Firstly, edit your post and keep the bad language for other forums. A lot of kids read this forum and so it should be kept up to a high standard.
My bad, used to talking in a discord were the language is a bit more colorful post has been edited.

as for the barrel, I might look into a madbull steelbull/python at about that length then(my local store also carrys modify ceramic barrels anyone know anything about them?) i do like using that mid weight bb type (.3 .32) as there pretty good with accuracy without taking forever to get there. never even thought of using a shorter barrel though lol.
 

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Most people do not think about a short barrel because longer barrels still work but I think you are better off with the correct length than an oversized one.
 

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Discussion Starter · #6 ·
Most people do not think about a short barrel because longer barrels still work but I think you are better off with the correct length than an oversized one.
my currently inner is sticking halfway in my foam filled suppressor so it will be nice to change it out anyway.

Actually starting to look at the ZCI HT motor(being a neo) and 16:1 shs set, if i go with a bigger spring i hear classic army spur gears are kinda iffy.

as for the said bigger spring, i keep seeing that i should get a longer spring and cut it down im unsure if that means get an sr-25 style or vsr-10 or if they just mean longer aeg springs. with my field limit being 450 i need to cut something around an systema m150 down to m140 levels.
 

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Discussion Starter · #7 ·
Honestly? You pretty much are doing it bang on. What's performance like on it now? Effective range, accuracy, etc?
consistently hitting 150-175 with the stock bucking flathopped and .32s
can hit 200 if i really need to but not effective range. fps is pretty consistant +/- 2 to 4 right around that 398 mark right now. i have high hopes for the gng green as people swear they are magical for flat hop(along with promy purples)
 

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Are you Keats on AS? What Hangtight said over there is good advice. For the spring, you'll only need to cut it if you need to drop FPS. Guarder springs are currently considered some of the best. Go with the ZCI, the SHS isn't the best choice for a DMR. The G&G is a great bucking, definitely better than the Lonex 70d(currently getting ~175' effective range with a Lonex and .28's).
 

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Discussion Starter · #9 ·
@specter yeah lol, figured I'd ask between the two lol as more information is always helpful, figure between the two and independent research I'll be set
 

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Hmmm...interesting. Your fps is pretty solid too. Try a .3 instead of a .32. Then again, it isn't much of a difference. The range is a little short, but not bad either. What kind of grouping at 175 ft? How big of a spread?
 
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