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Old February 20th, 2013, 15:37   #1
Reaver_RRTS
 
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HPA mods?

Under what conditions would one want to modify a gas rifle with HPA? and what's the advantage of it? Finally, how would it be used in the field? Would you be forced to lug around an HPA tank line in paintball?

These questions rose after watching some videos about the G96 shooting well above 500fps and the shooter mentioning it. I know HPA is more consistent than say Co2 and propane, so I suppose that's one reason to mod it?

Last edited by Reaver_RRTS; February 20th, 2013 at 15:43..
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Old February 20th, 2013, 15:54   #2
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Would you be forced to lug around an HPA tank line in paintball?
Yes.

You can also do full auto for a long time on HPA. HPA is not affected by the cold neither.
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Old February 20th, 2013, 16:02   #3
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well lets start by saying some of the funnest guns that wer made back in theday ran on hpa settups (search youtube for youth engineering mp5 im on ky phone so the link i post wont work for most)
also search google for "airsoft escort system"
many of the "classic" airsoft guns ran off of an external air source

that said the usefullness would be firstly shot to shot consistancy that you just cant really get out of a gas in mag setup, you can fine tune the fps you want and can expect almost every shot to fall prety close to that fps range (great for snipers and designated marksmen who need their rifle to perform the same from first shot to last when accuracy and consistancy is key.

the ability to play in colder weather without freeze up and slow cycling and miss firing and venting of gas from mag like happens with gbb/gbbr's when its cold outside.

yes you would be stuck with a remote line and air tank, but you can get prety small tanks and can get creative with the line and run it along a sling or something.
there is actually a cpl old threads on other forums of bolt action rifles that have the air tank in the stock so there is no remote line sticking out.

the design of todays gbbr's and bolt action gas in mag rifles would require drill and tapping of the fill valve on the magazines with a qd connection to attach the remote line to, the mag would still hold gas and the system would still work the same way just there would be an external air source connected to the mag.
the kjw m700 is probably the most comonly converted "modern" airsoft gun to hpa because gas systems kind of suck for snipers but once the consistancy of gas in mag is adressed via an external setup the viability of the gas powered bolt action becomes alot grater.

i wish i had picked up a YE mp5 back in the day when there will still some floating around but i was a lil poor back then from buying stupidly priced "black market" aeg's befor the laws came into place.

history lesson

http://screamingeaglesairsoft.wetpai...lassic+Airsoft
id love to see how theese new gbbr systems respond to hpa setups so have at er and post up lol.
there are still some places to buy classic guns (classicairsoft.net i think)
and also some good wright ups on how to build a hpa kit if you google around
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Old February 20th, 2013, 16:05   #4
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http://www.alabamaairsoft.org/t948-a...rnal-air-setup
^this is a good cost effective start to build an hpa/co2 setup
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Old February 20th, 2013, 16:15   #5
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Wishing my parents still owned a machine shop.. then again I've had that thought multiple times since June. :/ Bit of a fan of streamlining designs, was thinking if it'd be possible to hide my 13ci hpa tank in the stock but I'm not liking the idea of having a cable run from within the marker and attach to the magazine :/
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Old February 20th, 2013, 16:27   #6
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Thats may be a stupid question, but why didn't they not do an HPA mags? Is it because the pressure is too high for the mags and gonna be too dangerous? Is there someone who tried?
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Old February 20th, 2013, 16:33   #7
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Wishing my parents still owned a machine shop.. then again I've had that thought multiple times since June. :/ Bit of a fan of streamlining designs, was thinking if it'd be possible to hide my 13ci hpa tank in the stock but I'm not liking the idea of having a cable run from within the marker and attach to the magazine :/
then youll have to go classic, the line will either come out of the pistol grip or out of the stock depending

Edit: link removed do to content in non AV'd section sorry.

here you can see some classics some with grip connection some with stock attachment points, (they aint cheap mind you but they are durable for the most part.
wish i had 4 grand for an Asahi walther 2000, thats a sweet sniper rifle
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Last edited by Hectic; February 20th, 2013 at 16:50..
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Old February 20th, 2013, 16:39   #8
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Hectic the WA2000 is my favourite sniper rifle, but I do not have the money for such a system lol. I like bullpup weapons due to their unique design, and was planning to get the G&G F2000, but now I'm looking at the PTS PDR-C from Magpul and am not sure which to get :P anyway, I'm still looking around, as I do want to upgrade the G96 some, but I'm starting to get concerned that I made the wrong decision in buying this marker….
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Old February 20th, 2013, 16:41   #9
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Thats may be a stupid question, but why didn't they not do an HPA mags? Is it because the pressure is too high for the mags and gonna be too dangerous? Is there someone who tried?
you technically could run hpa or co2 or nitrogen in a regular green gas mag youd just need a system to fill it (ie a tank with a regulator and a hose with an adapter)
propane is about 147psi @27 degrees so youd be safe to run say 150 psi on co2 N2 or HPA in a green gas mag if you could build a rig to put the gas into the mag
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Old February 20th, 2013, 16:43   #10
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polarstar fusion engine. thank me later.

the tanaka/kj m40/m700 is also commonly converted to HPA.
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Old February 20th, 2013, 16:47   #11
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Originally Posted by Reaver_RRTS View Post
Hectic the WA2000 is my favourite sniper rifle, but I do not have the money for such a system lol. I like bullpup weapons due to their unique design, and was planning to get the G&G F2000, but now I'm looking at the PTS PDR-C from Magpul and am not sure which to get :P anyway, I'm still looking around, as I do want to upgrade the G96 some, but I'm starting to get concerned that I made the wrong decision in buying this marker….
if you got a gbbr as your first gun id say yes u prolly made tue wrong choice, get AV'd and sell it if you dont like it, itll work beter when it get warmer.
Ares makes a Walther 2000 as well. Not really any upgrades for it and sniping isnt for everyone for sure
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Last edited by Hectic; February 20th, 2013 at 16:53..
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Old February 20th, 2013, 16:52   #12
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Thats would be great for playing in winter, and if I remember well know have less maintenance to do when using HPA in painball, should be the same in airsoft.

Just not sure if the mags and the gun with support the pressure of the HPA, but if what you said is true it may be something worth to try. Gonna do more research on this.
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Old February 20th, 2013, 16:57   #13
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ya the mag can support the pressure
here is the pressure of propane at different temps
just use a conversion calculator to change from psig to psi (i think you just add 14.5 to make it psi)
http://www.propanecarbs.com/.
technically youd have more maintenance becauee you wouldnt have oil mixed in with the gas (unless you built your rig like that) so youd have to lune all your seals both in the mag and gun by hand
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Old February 20th, 2013, 16:57   #14
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The G96 isn't a GBBR, it's a gas sniper rifle.
Most people will tell you starting out with a sniper rifle is a poor choice, and I tend to agree. That being said, try it out. Seeing as you already have the rifle, you don't really have much to lose. You might be good at it. If you decide that the sniper role isn't for you then you have a rifle with some decent resale value to pick up a half decent AEG.
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Old February 20th, 2013, 17:03   #15
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Ok thanks for the link.

Found on some french forums that some people have tried (or heard, not clear they dont make full sentences...) that it's the space in the mags the problem too. CoČ is in liquid in the mag, so I understand for those, but GG was pretty sure was in gas form.

Think best thing is to buy 1 mag, tape a sticker on it to identify my (testing mag) and try it myself
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