Glock 17 Picatinny Adaptor Rail V1.5 by FFFTech/FFFTechnology The following description is for V1.5, but the files for V1 are still included in the .zip file, with V1.5 files as well. Compatible with Gen 3 & Gen 4 Glock 17 frames, as well as Glock models that share the same frame such as: Glock 17L, 22, 31, 34, 35 and 37. An updated design of the original Glock 17 Picatinny Adaptor Rail. Unneeded material has been removed from the internal structure, the edges of the picatinny rail channels have been scalloped, and overall height has been reduced by 1mm. Overall takes a few minutes less time to print, and needs a little material than the previous design. Printer Used: Monoprice Maker Select Plus Filament Used: PLA+ Print Settings: Extruder: 204C Bed: 56C First Layer Print Height: .20mm Standard Layer Height: .16mm Wall Thickness: .40 Wall Perimeters: 3 Infill: 25% Infill Pattern: Gyroid Material Flow: 100% Support Material Percentage: 10% Support material only for the rail slots directly above the print bed. Hardware Needed: 1x M4x10mm Hex Socketed Set Screw Installation: 1) After support material removal, slide the picatinny adaptor over the Glock Rail. 2) Hold the rail to it's rearmost position and start threading the set screw into the adaptor. 3) Drive the set screw flush with the bottom of rail slot. Check every 2 screw revolutions to see if the rail adaptor is properly secure. 4) Once secure, attach dem bomb diggity accessories.