Summary This is a scope for NERF's with the mount-rail. Print all parts vertical - there is only one little support needed for the central cylinder at the base part. I recommend to use some Nylon for the clip at the bottom - and print with a raft. I used PLA for base and blende; ABS for the silver okkular and Taulmann Alloy910 for the clip. Print Settings Printer: GermanRepRap x350 Resolution: 0,25 Infill: 30 Notes: Raft recommended for Nylon at the clip, 8mm greater than the base shape.