If you have a ruler handy you can measure the slots on your top 1913 rail, the length of an M-lok slot, and compare those to pictures that show M-lok 1913 rail sections. I doubt a 5 slot will fit.
I ended up using a Thorntail mount attached to the top 1913 rail. Using an M-lok 1913 section on the side just placed the light too far out from the weapon. It started feeling pretty snaggy.
Ron's suggestion might work.
A lot more cost and availability issues, but CZ's 922r kit includes a pretty nice looking M-lok handguard that gives you enough M-lok slots to put rail covers on for heat shielding and is significantly lighter than the stock MS pistol handguard.