This is an original hammer SHADOW Factory Hammer.
The width of the hammer is 0.314" it is wider then a standard hammer, which is 0.218' Wide.
It will only work (without modification) in slides with the wider Notch.
These hammers are take offs from new guns.
They were only test fired from the factory in CZ, never used.
May show some small marks.
NoticeDue to variations in manufacturing tolerances in base firearms some replacement / custom / drop in parts may require fittingWe ALWAYS suggest the use of a competent gunsmith