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MP7 and propane


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#1 airsoftrambo

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Posted 11 April 2010 - 07:38 PM

I was wondering since I'm going to be ordering an mp7 in the next 2 months or so, if the MP7 can take propane without any upgrades, and also if it would harm the gun in any way? thanx for the help! :turned:

#2 Vamp2269

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Posted 12 April 2010 - 02:47 AM

It can take Propane/greengas with stock internals just fine. I don't think propane will hurt your gun, I use it with a madbull V.2 propane adaptor and had no problems so far. I've put like 2000 or so bbs through it with no issues.

#3 dobey

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Posted 12 April 2010 - 03:36 AM

I have never put anything but propane in mine and it has not missed a beat yet.  I have run it through 6 weekends of games so far without a hiccup.

#4 Guest_allizard_*

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Posted 12 April 2010 - 08:45 AM

KWA official stance is we don't recommend using Propane.  It's not because the gun can't take Propane.  It can, but the problem is Propane is dry. How much lubrication is require is NOT measurable.   Besides, we are now suspecting over lubing or the type of oil use may contribute to bucking swelling up and jam the bbs.  Be careful what you use, it might void your warranty.

#5 Vamp2269

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Posted 12 April 2010 - 11:35 AM

I Use KWA provided silicon oil in my adapter and it works good. And even with green gas the level of silicon oil added varys from brand to brand,

#6 intelXE

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Posted 12 April 2010 - 11:37 AM

I agree with allizard, me using propane and overoiling caused my bucking to swell and eventually degrade enough it became unusable.  Back to green gas!

Edited by intelXE, 12 April 2010 - 11:38 AM.


#7 airsoftrambo

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Posted 12 April 2010 - 04:49 PM

so using propane voids warranty?

#8 Guest_allizard_*

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Posted 12 April 2010 - 11:31 PM

View Postairsoftrambo, on 12 April 2010 - 04:49 PM, said:

so using propane voids warranty?

Yes.

#9 galactica

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Posted 13 April 2010 - 03:07 AM

so which kind of green gas has not too much oil in it, thus causing the swelling of the hop?  There are certainly people with this problem who haven't been using propane, aren't there?

#10 Spiggy

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Posted 13 April 2010 - 08:42 AM

The problematic guns I've encountered at the tech center are generally propane or aerosol victims

#11 Vamp2269

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Posted 13 April 2010 - 06:05 PM

I use propane and Aresol lubricants too. I always use KWA silicon oil in my propane adapter and in the seals and inner workings of the bolt and the seals, I never lube the hop-up, and I only use the aresol lubricant ,which is pure silicone oil and not grease i may add, on the mechanical parts like the grooves where the bolt slides and in the trigger and other parts in general. None of the aresol oil gets on the hopup and inside the bolt so I do not forsee problems cause by what I am doing. Plus, I do not shoot my mp7 right after I serviced it so I give it time to allow all the volitile additives in the aresol lubricant to evaporate off before shooting it(If there are any additives in the lubricant). I do not think I will have any probles and the adaptor puts a very staedy and minimal amount of silicon in the probane when it is realeased. I hope I won't have any problems but I don't think I will since I'm being careful. I am going to get some good green gas because propane makes my gun smell bad and the air freshener in green gas covers the smell.

Edited by Vamp2269, 13 April 2010 - 06:09 PM.


#12 Vamp2269

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Posted 13 April 2010 - 06:12 PM

View Postgalactica, on 13 April 2010 - 03:07 AM, said:

so which kind of green gas has not too much oil in it, thus causing the swelling of the hop?  There are certainly people with this problem who haven't been using propane, aren't there?
Sapian arms has had reports of excess silicon oil. I am trying to get bestek green gas I heard that is a good performing green gas.

#13 tiger

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Posted 13 April 2010 - 08:12 PM

DELTA gas is a very good brand.

#14 generalvinny

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Posted 13 April 2010 - 09:01 PM

View PostVamp2269, on 13 April 2010 - 06:12 PM, said:

Sapian arms has had reports of excess silicon oil. I am trying to get bestek green gas I heard that is a good performing green gas.
never ever use Sapien Arms. :thumbsdown:

#15 dobey

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Posted 14 April 2010 - 04:29 AM

80 plus mags through mine on propane without a single issue so far.  I don't know what you guys are doing to your guns but my hop up is fine.  At the beginning of the day I will squirt a bit of silicone spray on the propane can, then put my AI propane adapter on, and forget about it for the day.  Not a single leaky mag, or any of the crazy hop up issues I have read about on here.  I even had one mag that I loaded and gassed the week before lock the bolt in the morning in 30 degree weather.  The gun has been flawless so far on propane.

#16 galactica

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Posted 14 April 2010 - 05:01 AM

same here, Dobey.  I've only used green as maintenance gas now and then to maintain seals. Both guns are doing great.

#17 Spiggy

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Posted 14 April 2010 - 11:32 AM

Forgot to add, also had a MAPP gas victim.  Apparently the RMA was from a machine or auto shop.

#18 Vamp2269

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Posted 14 April 2010 - 11:36 AM

View PostSpiggy, on 14 April 2010 - 11:32 AM, said:

Forgot to add, also had a MAPP gas victim.  Apparently the RMA was from a machine or auto shop.
What? Can you go into detail? I don't get what you just said.

Edited by Vamp2269, 14 April 2010 - 11:37 AM.


#19 Spiggy

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Posted 14 April 2010 - 12:13 PM

:rolleyes2: If you don't know what is MAPP gas and what it's intended use, don't worry about it.

#20 galactica

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Posted 18 April 2010 - 03:01 AM

Spiggy, can you please recommend an approved brand of green gas?




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