Installed the Limbsaver 10403 on my M1014 today using zinc-plated M4 x 16mm hardware from HD. Fit and finish of the recoil pad was excellent- slightly larger than mating surface of c-stock but I was able to get the overhang uniform all the way around.
This M1014 came with the factory fixed c-stock so modifying the recoil pad to accommodate the stock tube when collapsed is unnecessary at this point. I’ll do that when I get around to modifying the stock to make collapsible.
Job was a breeze thanks to the information found here.