Board Thread:General Nerf discussion/@comment-28773666-20190427192747/@comment-24743922-20190428030418

Well, if the handle is empty, you can open it and put the entire thing- LEDs, wiring, battery box- inside it. Some hot glue will hold the mech in place.

However, you'll only be able to swap the batteries by opening the whole blaster. Beyond that, you'll have to cut the shell.