My version of the multi used Single Point Scope, which is part of a lot of Star Wars Blasters.
It is designed so you can put a 3mm acrylic rod in the center, probably a Lego Red Light saber will work, haven't tried yet though.
The Scope rings mounts with some modifications were remixed from this great piece:
http://www.semaker.com/productdetail/8146
Enjoy, I've already printed it, with no issues!!
Regards!! Straeker.
