This part now features a de-pressurizing screw so you can remove all air from your bottle or reservoir.  This makes it an ideal option if you're using a bottle instead of the standard reservoir. If you lock your regulator by accident, you can de-gas the bottle without a problem. Previously this could only be done with the standard reservoir.

Part Nº 4 of EDgun · Leshiy 2 · Spare Parts: New Reservoir/Butt · LSA242000.