What GBB Gun Gas Do You Recommend?

[ArmyCarbiner]

Hello fellows, bought my first GBB rifle today, the Marushin M2 Carbine. All my previous airsoft rifles are spring or AEGs so I have no knowledge of what I need to power a GBB rifle. Can you please recommend me what brand of gas I should use? Hope one that has the best performance and less harmful to my gun (I dunno, maybe some cheap gas would damage the internals? Another question this is). Thanks guys!

[CDN_Stalker]

I'm gonna guess guys will tell you to get an AI propane adaptor and use the green bottles of propane made by Coleman.

[ArmyCarbiner]

Thank you

[GBear]

I would do some research around. Look up the specs of the rifle. Read the FAQs around here. Personally, I would've done it prior and post buying the rifle. Google is your friend!

[wildcard]

If you use green gas your Marushin is going to break, they require a lower powered gas like the HFC134 or duster gas. get a AI gas gun adapter kit there is a duster adapter that comes with it USE DUSTER ONLY the internals of the stock Marushin M2 is not meant to be powered by green gas or propane

[m102404]

I am not familiar with that specific model. You should do some thorough research specifically if that rifle is meant to use duster or HFC134 (I might have that letter/number combo wrong) only. Some models are not meant to run on propane/green gas (same thing) pressures. It will damage internal seals and/or parts.

An example of this is KSC's MP7 gas blow back rifle/smg...they recommend duster only. Propane can and will cause the nozzle to blow/crack.

Other than that...if it's green gas/propane ready...then any propane (Coleman, Rona's brand, welders stuff, etc....) will work. Use silicone oil in the mags to lube the internal o-rings and stuff.

* nevermind...see Wildcard's post

[ArmyCarbiner]

Thanks guys, taking notes as I type this.

[ILLusion]

ALL Marushin guns are meant to be used with duster (HFC134a, Tetrafluoroethane). If you use propane with it, it will experience increased wear and finding replacement parts will be close to impossible.

If you are using duster do NOT use difluoroethane, which is the most prevalent type of duster these days. READ the labels first before purchasing the can - it will tell you if it is difluoroethane or tetrafluoroethane.

[shiftsup]

Do you have the SI (Spartan Imports) version?

They are Green Gas / Propane friendly. This is more of a fact with the Marushin M1 Garand than it is with the Marushin M2 Carbine.

You can use propane / green gas in the mags if you have the SI version. it'll clearly read SI version in the manual and on the box.

HOWEVER, if you fire EITHER version (Duster or Green Gas) of the M2 in full auto and empty the entire magazine of 15 rounds you will eventually break the bolt. You'll be able to tell that the bolt is going to break as the black metal will start to have grey marks on it showing where it will crack.The stock bolt (part #7) is not made of a quality metal. A replacement quality bolt will run you over $100 U$D if you are fortunate to even find one in stock.

SIMPLY PUT, TO AVOID DAMAGING YOUR GUN, AVOID FREQUENT USE OF THE FULL AUTO FEATURE ON THE MARUSHIN M2.

The M2 manual does have some caution in its contents about the full auto feature written in it. But I'd just not bother with the full auto feature except to see how it works. Definitely do not empty a mag on continuous full auto.

If you are filling the mags make sure it's at least room temperature and wait a minimum of 15 minutes before using as the mags cool down pretty good.

[CDN_Stalker]

Originally Posted by ILLusion

ALL Marushin guns are meant to be used with duster (HFC134a, Tetrafluoroethane). If you use propane with it, it will experience increased wear and finding replacement parts will be close to impossible.

If you are using duster do NOT use difluoroethane, which is the most prevalent type of duster these days. READ the labels first before purchasing the can - it will tell you if it is difluoroethane or tetrafluoroethane.

Typically found in the warnings portion of the label.

[kenmaru]

Very useful information!