Berget Forum

Hello folks,
has anyone out here any experience with this gas driven M4/A1 ?
I would be gratful for any information.

Hi Oberlix.
I have the inokatsu M4 sopmod 2001.
Shooting with it is a absolute pleasure.
But I have to say the maintaince is a bitch and the upgrades quite expensive.
If I had to buy a GBB again I would probably buy a WE GBB or any cheaper rifle and then upgrade it.
Running on green gas it won't cyckle proper and red gas is hard to come by.

But on the other hand, comparing a GBB with a AEG is hard.
I have to say of all the rifles I have my GBB is the only one that I'm in love with for real.
You know it's a life long relationship and not a temporary fling that will break after a while.

Hello Rainer,

Well this King Arms / Cyber Gun Version and the feeding of BBs is a nightmare. I suspect the proplem is the plastic bolt feeder in the metal boltcarrier. The recoilspring has too much power and the feeder pin is too week but it could be something else - I don´t know. The platic Bolt can be replace with a metal one, so the whole bolt assembly is then in metal and a lot stronger.
Any ideas ?

What kind of mags are you using?
I have experienced very different result with different mags.
If the lip feed on the mags are to low this will result in bad feeding.
I could also just be the mag spring

Try to give the whole firing control group a good cleaning first. Then check your nozzle o ring. The one on my 2011 bolt was a little thin, it didn't seal that well. Maybe try replacing it with a slightly thicker one?

If the plastic part on the bolt carrier is intact, it sounds like this wouldnt be the reason for your worries.
Ra-tech carries a varaity of upgradble parts of high quality included metal bolt carriers, or try to troubleshooting on http://www.gasguns.info.

Thank you Rainer for the info.

I am using the standart Mags for this gun from King Arms. The gun is too new to need new seal rings and the nozzel is also okay.
I have checked your link to gas gun info but there was nothing concerning the King Arms version.

Then my friend , i'm all out og suggestions.

Then i would try to change the plastic parts.

I am just posting my 02 cents here....

Maybe the buffer spring is too hard, that plus winter temps, might result in "short stroking" by the bolt.

If that happens, It is likely that the magazine spring can't keep up the pace set up by the bolt, therefore not loading BB's properly or in time...

When you cycle it manually, does it load correctly ??

Hope it helps, wish U luck..

actually the buffer spring is giving it the right strong push and I have ordered a full metal bolt assembly for heavy dosh. I can´t help it, I still think it must be the magazin putting too much holding on the BBs.