If you have several pistols and unique holsters for each of them, Safariland QLS (Quick Locking System) is a very handy solution for changing between them. Just snap the suitable holster in place without time-consuming adjustment.
The QLS kit includes two main components. You attach the locking fork to the holster and the receiver plate to e.g. the belt loop or tactical leg shroud. This enables you to rearrange gear quickly and easily without tools. Attaches to any Safariland Holster with the 3-hole pattern and similar products made by other manufacturers. The QLS fork and plate combination passes the Level I Retention™ pull test.