Here is what I found:
The ZERO disconnector is available in variants ZERO - 0, ZERO - 0.2 and ZERO - 0.4. This component reduces the pre travel in SA mode for the SP-01 Shadow models of approx. 13 mm to the following values:
ZERO - 0 ... pre travel almost zero (fitting required)
ZERO - 0.2 ... pre travel approx. 2 mm
ZERO - 0.4 ... pre travel about 4 mm
This disconnector was adapted to the DA / SA Custom hammer SHADOW-ORANGE during production and should be installed in combination with it.
The ZERO - 0 variant usually requires fitting work. For the ZERO - 0.2 and 0.4 variants, occasional fitting work may be required, as the trigger elements of CZ guns may have different manufacturing tolerances and, in principle, there is no Plug & Play component replacement.
The disconnector has rounded edges on the sliding surface to the gun frame, which protects the gun frame. The contact surface with the trigger link has only 1.25 mm width which reduces the friction to an absolute minimum. The disconnector is completely through hardened whereby no increased friction on the frame or trigger pins can occur even after wear of the surface.
ATTENTION: with CZ models with fall protection! Here, a preference of about 7 mm is required to activate the fall arrest lever to open the firing pin blocker in the closure. The ZERO disconnector can also be used for these models, but must be reworked on the inside (contact surface to the trigger rod) accordingly. This work should only be performed by qualified personnel.
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