If it has the RMSc footprint on the slide a very inexpensive choice for a direct mount would be the original SwampFox Sentinel, the MANUAL version, now at Optics Planet for under $115...
This one also has the "shake awake" and auto-shutoff features! For that price you can't hardly go wrong, IMHO.
Cheers!
P.S. They have a pretty good warranty as well.