I have worked for months with multiple failed attempts to make what was already in my opinion the best two lightguns on the market better.  The Retro Shooter Reaper and the Sinden. The builds need no tools, no glue, no gun modifications, They literally snap together in 30 seconds. and is ready to play.  Pump action activates the first button on the gun seamlessly.  3d printed from durable PETG so it last.