This light isn't intended for the Dagger Micro as I found out after the fact. This key will index it properly but you may still have issues tightening it down as it seems meant for a wider rail.. I ended up using a short strand of TPU as a shim to make up the difference.
Enigmish Plate - Independant Belt Printed Holster Concealment System
3DPISSER9000 - THE PINNACLE OF FDM PISSING TECHNOLOGY PISS
Keltec CMR/PMR/CP-33 extended bolt release button 1.1