Want your revreaper to fire halfdarts? You'll need to extend your pusher, this extended pusher clamps onto your existing pusher after some slight dremeling. Depending on your dremel skills glueing it on might be required :)
I dimensioned this to work with talon mags and adapter, but it might work with others?
Being a flywheeler ol' revvie doesn't like worker halfdarts, so for optimum performance I suggest cutting down adventure force darts.