[Silverthorn]

I own a new TM VSR-10 and I upgraded a bunch of parts (all laylax) : all the sears, piston, teflon cylinder, cylinder head, sound damper, spring to bring it up to 415-435, ...

I have tested with 2 different inner barrels and hop-up units. I tested with madbull 0.36.

1. stock hop-up unit, upgraded hop-up rubber, Km inner barrel 6.04
2. Laylax hop-up unit (the gold one) with the proper inner barrel that fits with it (6.03)

In both cases the BB flies up to the right after a while, whatever the hop up setting.

I am trying to narrow down the cause but can't seem to really find it since with 2 different hop-up units and barrel it does the same thing.

One thing to note : I lost the original hop-up nubbin (the little thing that pushes on the hop-up rubber) and replaced it with a piece of plastic cut from a "Bic-style" pen. Could that be the problem (so it's much more rigid) or can it be something else?