Punch button for the HDR50 Gen2 (the CO2 cylinder percing button come with a different design in gen2 then in gen1)
In the “wait position”, the punch button is “twisted” (something around 27,5°)
When the punch button is hit, it turn and center in the axe of the revolver.
This help you, in addition with the pressure indicator, to know if the pressure in on.
The author remixed this model.
The new design fit with the new style of punching button for CO2 cylinder in the Umarex HDR50.
Like the original design, it can remain installed.
And it help tightening and removal of the CO2 cylinder “by hands”