Glock Rear Sight Drift Block by FFFTech/FFFTechnology A block for drifting the rear sight via hammer and punch from a Glock slide. The rear sight can removed from either side of the slide, as the block has channels on either side to accommodate. Designed around the Glock 17 Gen 4 Slide; though should hold Glock 19, 26, and other slides with the same overall width and height dimensions as well. Printer Used: Monoprice Maker Select Plus Filament Used: PLA+ Print Settings: Extruder: 205C Bed: 56C First Layer Print Height: .24mm Standard Layer Height: .2mm Wall Thickness: .40 Wall Perimeters: 3 Infill: 25% Infill Pattern: Gyroid Material Flow: 100%