Summary

Thick Milan Coupler B. The normal Milan coupler is 4mm thick at the pin to the outer wall so 2mm sidewall print is the most you can do regarding strength. You can print this at 3.6mm walls with supports from the build plate. It should print upright, 30% infill 3.6mm side walls.

The grip strike solo is for kd-mono knuckle buster.

Elite upper magwell, photo is older, allows you to see if you have darts in the magazine.

The muzzle 5 fits a standard caliburn, the parts where the nut and bolt pull are thicker and will hold a lot better. You need a 1/8- 1/4 inch longer bolt though. But its worth it.

The scar base fits slugs standard 5/8th scar barrel system. The difference is the scar printed at .2mm resolution will fit your barrel and not wobble.