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Cuervo

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Discussion starter · #1 ·
I play sniper/scout with my trusty BAR10 and my team and I love it, but i want to delve into the DMR role, my first replica was that same BAR10 and ive fully upgraded it, now im getting a mancraft system for that pretty soon, but since im going the HPA route im musing the idea of also trying a DMR setup which will use the crane stock and a mancraft system too BUT LATER, for now i would like to learn how to tune it/use it as a AEG but one if my main issues is my complete lack of knowledge when it comes to DMRs.

I DO have the basics ive learned from studying and studying a lot for the BAR10/l96 platforms and normally i would just follow the guides in here and build a good DMR which in time i would learn to tune up, that shouldnt be a problem, the thing is my team is going to standardize the use of m4s in the assault and DMR role, they want to be able to support each other with the same mags so ill be selling my kmp9 ( D: ), a bass guitar and my l96 and ill get something thats compatible with a m4 mag.

I wouldve loved going with an A&K SR-25 since, for what ive read it uses the v2.5 gearbox which provides higher air volume and my intent is to use as heavy a bb as possible.

So, tl;dr:

Is there a way to either:
Get a SR-25 --that USE the v2.5 gearbox-- to take m4 mags?
or
Get a m4 to use a v2.5 gearbox?

I dont care for looks, i care for performance and durability.

Thanks for your time and help.
 
#3 ·
Go with a short barrel on an AR15 platform, it should do just as well as far as ratios go. The SR25 makes things easier though.

Honestly, Id just explain to your team that you're not going to be swapping mags anyway, and that an SR25 has a performance advantage so you want one of those. After all, it's not like you'll exchange mags with the assault rifle guys. They're not going to put .4 bb's in their guns :hehe:

But again, if you really want M4 mags... A V2/V3 gearbox with a short barrel is perfectly fine :tup:
 
#5 ·
I see why this is appealing to you, however I know this from practice. It is not as great as you might think. Unless your entire team uses the same setups and use the same bbs then this would work. However, in practice, most of the guys on my team all run different guns, with different weights as they all tech there own gear.

I run the heaviest out of my team, I shoot .33-.36 with my m4. everyone else shoots at most .28. If I grabbed a mag off of one of my teammates I would not be able to hit anything as my gun would over hop the snot out of those.

Up to you though.
 
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Discussion starter · #8 ·
Thank you all very much, i hadnt thought about the different bb argument since i HAVE gotten into discussions about this with my team and yes i KNOW this is completely irrational and impractical, ill try talking to them, if not ill go with s JG M4 s-system, shorten the inner barrel to adjust for ratio with .40 bbs and 450 fps unless you do not agree with the good things ive read about that platform (my JG BAR10 and my sisters JG G36 are work horses and perform awesome), i think good about that brand specially if i plan to replace the internals.

I would LOVE to get the L85, i love those looks, but as ive said i plan to HPA them and part of that (that i hadnt mentioned) is to use an airstock, bad news for the l85.
 
#9 ·
Some forward looking advice -
Inner barrel, nozzle and settings depending, using an airstock is going to limit you to 6-8 midcaps per 13ci tank. The sharing aspect will not be an issue since that is a reasonable number of mags to haul.

My experience with JG M4's has been that the body fitment is only OK when compared to a G&P or VFC for metal bodies or Ares for composite bodies. While this may not be as large a concern for your average assault AEG, once you get a HPA engine in it and upgrade the hop up chamber the body slop presents itself in a big way.

Which HPA engine are you considering?
 
Discussion starter · #10 ·
Mancraft PDiKS with airstock (thinking on trying to adap the airstock to my JG BAR10+SDiKS, would be interesting to switch inbetween.

Ok, i think ill go with a G&P fighting cat

1) work on internals (from hop up to correcting AOE, etc) and use it as an assault replica in the meanwhile until

2) its time to get the HPA system in then ill get a bit of a longer barrel (outer and inner).

That way i can tune the PSI up in the regulator to high FPS and use it as a DMR or tune the PSI down for assault role with the short rail/barrels.

Thanks for your imput Corriander :)!
 
#11 ·
A well built HPA engine does not need a long barrel to have DMR performance. An electro-pneumatic system has the ability to control the pressure, poppet dwell and nozzle orifice size to achieve the desired FPS with a desired BB weight. It is all a matter of proper tuning and accurate assembly.
 
#12 ·
A tip for tuning an AEG to be a DMR. The gun being used as a DMR doesn't mean you should be doing specific mods to it that a normal AEG won't receive. Everything you'd do to an AEG can and should be done to your DMR and vice versa. Really the only thing that's different is what spring you use. That's not to say that the importance of certain aspects will be the same though. Just treat it as an AEG with a bit heavier spring.

The reason I bring this up is because people seem to think that because they're trying to build a DMR there are special mods that need to be done to it and instead ask something like "What mods should I do to make my gun a DMR?". Assuming the gun is already tuned properly, the answer is to simply throw in a heavier spring.
 
Discussion starter · #13 ·
Corriander said:
A well built HPA engine does not need a long barrel to have DMR performance. An electro-pneumatic system has the ability to control the pressure, poppet dwell and nozzle orifice size to achieve the desired FPS with a desired BB weight. It is all a matter of proper tuning and accurate assembly.
Click to expand...
I see, i was parting from the assumption that i would require to change the lenght of the barrel to get a good ratio but yeah forgot it only applies to systems without a PSI regulator, i actually see it as a great advantage to carry a smaller platform that performs to "DMR standards", should be easier to crawl around.

CrusherW9:
Yes i do know that, my main issue was the air volume needed to lift heavy bbs but im well aware and even looking forward to mess around with the AEG systems, as ive said before, my area of expertise resides mainly in BARs (and a few GBB secondaries) since i was one of the weird ones that started playing airsoft straight with a BAR and didnt changed, this is even because im going with an HPA for my BAR10 hehe if i wasnt going to convert it to HPA i wouldnt even be looking around AEGs since my team and myself are happy with me playing sniper n_n.

Thank you guys!
 
#14 ·
When you do the HPA conversion, I would recommend you go with a P* FE in this case. The reason being nozzle selection, under the assumption you do not have a lathe. A FE with a red or purple nozzle combined with a highly polished tightbore will provide you an efficient base for the airstock.

If you do have a lathe, bore out the stock nozzle to at least a #20 wire, which is equivalent to a red. A purple is a #10 wire. I tend to use a #15 on my builds since it opens the nozzle completely up while leaving enough material to put a slight cup on the end with a 1/4 ball end mill.
 
Discussion starter · #15 ·
Uhmmm... i was thinking on going with the mancraft conversion kit for AEGs, its half the price and im not interested in full auto or programable features that the P* offers, i just play with semi all the time hehe, any other advantages aside from programable everything over the mechanical features in regards P* vs Mancraft?
 
#16 ·
My primary concern on the mancraft is pairing it with the airstock.

The mechanical system uses a pressure relief system to advance the nozzle and fire. Additionally, you only have control over the output pressure, not the volume. Matching a barrel to that volume would be important, though you could likely reduce it by putting some spacers inside the cylinder.

You may not get the efficiency from it to make a 13ci tank fieldable for long scenarios.


I know P*'s have a reputation for a high ROF. This is a user choice. All of the HPA conversions I've done have been sent out with the max of a 3rnd burst, with the exception of SAWs.
 
Discussion starter · #17 ·
Dang, there goes my plan, i was thinking that by adjusting PSI i would adjust volume...

Ill mail the Mancraft guys and ask for the amount of volume their system shoots and if they have an idea on how to regulate it, that could be a way to sort this out.

Thank you Corriander, youve been a great help, ill let ya know if i switch to Wolverine or P* :)!
 
#18 ·
You do adjust volume by adjusting psi, just not in the same way as with the electro-pneumatic systems where you adjust both psi and duration to control volume.

My primary point remains though - the mechanical system vents air to fire. The volume of that is unknown to me and will reduce the number of shots you get from a 13ci tank. If that is a couple bbs vs a full midcap is unknown.
 
#19 ·
Something I have always wanted to know. Since P* or the likes has the ability to tune for HPLV vs LPHV, what effect does both extremes have on backspin applied assuming both setting yields the same muzzle energy and hop up setting remains unchanged. Really love to know.
 
#20 · (Edited)
Hmmm.... I honestly do not think it would make much difference. The force required to apply the torque to your bb is going to be the same in both setups. It is all going to boil down to is how long the bb is in contact with the inner barrel. However this should not even be different as the energy is the same.

Given if the only thing changing is the air delivery method.
 
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Cuervo
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