[Jagd]

Well...I will jump in, since I have the TM Mk23 too and I can tell you the problem is not the hop-up rubber but definately the hop-up system of that gun the problem.

The hop-up design is flawed and I always dreamt about the day an aftermarket company would do a metal hop-up unit or something different, because the stock one does not work.

Usually TM have excellent hop-up units, but not on that one. Bending the hop-up arm will fix your problem for maybe 1 or 2 mags, after that the arm would go back to normal, being too loose and you will loose range like crazy, not only that, the wheel for dialing the hop up is plastic with no notch or grooves so it will unwind itself without touching anything after shooting severall BBs, there is a mod that I have been able to do myself that so far as fixed the issue and it's much more than only bending the arm. If you want to do a permanent fix, you will have to do it in 3 steps.

I will try to post pictures or just do a seperate thread on how to fix this issue. I have been loosing alot of time trying to fix this thing.

The gun is amazing and the sound report is legendary...but the hop-up unit is faulty and real garbage. Nothing compared to what TM is capable of. For those who will say that their mk23 work fine...it's only a matter if time before you loose range because of the hop-up arm, sooner or later it will happened