RDR T1 V1.0.1: FFFTech/FFFTechnology A set of basic risers for red dot optics that use the common Aimpoint T1 mounting footprint. The +15mm to +25mm risers have a hollow section through their bodies to allow for use of iron sights. Six risers are available: (READ NOTES) * Standard Mount * +5mm * +10mm * +15mm * +20mm * +25mm Update V1.0.1: Changed design designation and document summary. Printer Used: Ender 3 V2 Filament Used: PLA+ Print Settings: Extruder: 220C Bed: 56C First Layer Print Height: .20mm Standard Layer Height: .12mm Wall Thickness: .40mm Wall Perimeters: 6+ Infill: 25%+ Infill Pattern: Gyroid Material Flow: 100% Support Material Percentage: 18% Print the mount/riser upside-down Hardware Needed: 1x M5x30 Hex Socketed Machine Screw/Bolt 1x M5 Hex Nut (Be sure both bolt & nut are the same thread pitch.) Notes: 1) The height of the Standard mount is (from the top of the picatinny rail to the bottom of the red dot's mounting surface) is 5.53mm. That means if you attach the +20mm riser, it's actual height is 25.53mm. The millimeter designations for the risers are based on the addition to the Standard mount's height, not the riser's height itself.