Just a simple modlet that adds a weapon mod f or the crossbow that makes it able to fire 5 times before reload. It's a tier 2 mod, and should be found in loot and traders both.
Known Issue:
The animation looks like it puts a stack of bolts onto the crossbow and fires them all at once. The arrows are still "loaded", and can be fired but the crossbow looks empty. I don't know how to fix this, if at all, with just a modlet. Sorry! https://www.mediafire.com/file/boe0ttlnzzk0c6j/CrossbowRepeaterMod.rar/file