This was not really designed to be easily reproduced
This is an add on for the Nerf Nite Finder. You will have to cut the front of the gun to match the cover.
It was designed to use a 1.6" peice of Worker plastic barrel to fit over the Nite Finder barrel and into the front cover as well as a 7.25" piece of the Worker Nerf to picatinny rail section for the top.
The "tubes" are one inch outer diameter frosted polycarbonite, cut to the width of a standard roll of blue painters tape (about 1.4").
The only piece that would need support is the interna bracket part.
Thier are two versions of the LED mountd one with the decorative parts and one without.
You will need to print two of each of the tube bases and caps.