Rogerborg, thank You for replying!
I did little research on my email, and out of the box I've had replaced gearbox bushings, and spring guide (directly when buying it), I've also made mosfet unit myself back in these times, changed mag adapter to fit m4 style magpul mags, etc. Surely I will dissasemble the thing to the bone for a cleanup. I also recall something about the shimming being done at the shop first when I bought it.
I could invest in it, but I dont see a point for a occasional Sunday goofing, so just to make it work nicely:
- new greases
- new bucking as proposed
- new orings
I came up with these upgrade searches and now you have flat hops and whatnot and I've got no idea what it does better, and will it fit ancient G36.
As far as I remember I have there this sort of HU chamber, I just remember not liking someting about it, not sure what was that.
If I can fit something more sturdy, that keeps everything stable, I can spend a little on something.
or