It could be about a character trying to repair the broken laser musket. Maybe they face various challenges in finding the right parts and tools.
Perhaps the story focuses on the origin of the broken laser musket. It could be that it was damaged in a great battle, and now the main character has to figure out how it got broken and if it can be restored to its former glory. They might encounter other characters who have different opinions on the musket, some thinking it's a lost cause while others believe it can be fixed.
One possible plot is that the broken laser musket has some sort of special power or significance even in its broken state. The protagonist discovers this hidden aspect while trying to fix it. Along the way, they may have to deal with enemies who also want to get their hands on the musket for its potential value, whether it's for its technology or some other mysterious reason.