leman russ sponsons

I wanted some sponsons for @GunnarUK's battle tank so I cut @PhysUdo ones

If you print the bolter you **don't** need "leman russ sponsons - weapon mount insert.stl".

I included this file only in case someone wanted to "glue" it to other weapons.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/fV2KO7o4nEW