This is an experiment. I used two designs and combined them into one, and then split them and a lot of stuff. The idea is to have a scope mount for picatinny rail mounts. The inside diameter of the mount is 28-29mm (depending on shrinkage of ABS), I have not printed one yet. the reason it is split, like it is, is cause i originally had it as one single piece, but then realised that various scopes may vary in size of the gap, and length, etc. So i hope this allows for some form of free movement when mounting. You will need 6 x 3m or 4m nuts and bolts - two 20mm and four 10mm lengths. All credit for the original designs go to the guys that made them (sorry i cant remember who they were or where i got them, the were on my PC, and I did not keep the original details).

I added a single section to the thingy files, print one of them twice, or download the file with both together. Hope that saves some plastic somewhere for someone :)