This slide stop lever does NOT fit SF or Gen 4 models.
GLOCK NP3 Coated extended slide stop lever for 10mm/.45 GLOCKs. Fits all of the following GLOCK models: 20, 21, 29, 30. These are factory OEM parts that have been NP3 COATED.
This finish is done by Glockmeister and NOT GLOCK Inc.
NP3 finish is an electroless nickel-based finish for steel, stainless steel and aluminum alloys that co-deposits sub-micron particles of PTFE (polytetrafluoroethylene), otherwise known as Teflon, with electroless nickel. NP3 permits firing for longer periods of time between cleaning, dirt and powder residue have no wet or oily surface to cling to. When cleaning is required, the effort needed is minimal - usually requiring only a soft cloth.