These are the older "Legacy" style doors that fit pistols requiring a different gap in the rear portion.
These are refurbished from customers who typically have bent the metal prongs that hold the plastic switch that interacts with your finger.
Sometimes the plastic switch caps have been pulled from the metal switch and reattached using marine-grade epoxy.
These are still fully functional, retain all the switch's operations, and, aside from the small plastic switch being slightly more rearward toward the user, are fully normal switches.
Want the RPM modification done with them? No problem! Choose from the pulldown menu.
BLACK IS THE ONLY OPTION UNLESS OTHERWISE NOTED IN PULL-DOWN MENUS