To my knowledge, “M10” thing for Savage retail listings are just a matter of nomenclature - the vendor is denoting “model” by “M,” much as you’ll see folks typing “M700” for the Remington 700 or “M70” for the Winchester Model 70. While Ruger actually stamps “M77” on the side of their rifles, most don’t - but retailers will list rifles as “Mxxx” all the same.
Chassis rifles typically do not require glass bedding, but it doesn’t hurt to do so, even in a chassis - but there are also plenty of stocks out there with aluminum bedding blocks which also do not require glass bedding. There are two disadvantages I would point out for the Savage BA Stealth if you start shooting for matches - 1) it’s a Savage, and feeding and extraction WILL bite you in the ass, eventually (or immediately), and 2) the MDT LSS chassis of the Stealth has quite a short forend, which doesn’t suit well for competition. Adding an Mlok compatible Arcalock rail from Area419 can help add some length, almost like a spigot mount, and it helps flatten the bottom to better ride a bag if they are doing precision rifle type matches, but it’s still not as good as it could/should be for that kind of shooting. Nice for carrying the rifle a long ways and not shooting much, but not great for shoot-and-move precision match type shooting.