Janky Tube Sights for Picatinny Rails

Edit 6-19-21: Added n-strike rail tube and u channel pic variants. 

A janky sight that can use any size tube that is equal or bigger than 1 1/2 inch. Was designed specifically for leftover caliburn tubes that are too short, oversized, cracked or damaged.

Use a large zip tie to secure.
Use 2 4-40 screws to secure to the rail.

Remix of https://www.thingiverse.com/thing:2376150

https://www.thingiverse.com/thing:3541911

Print instructions

Maybe use a brim.