Usually on a MC you see the little up curve at the buttplate that rises up to the higher comb. I'm not a syn. stock guy so I'm not sure on what you are looking at, but somebody here sure is. You could keep your eye on the classifieds here for what you want, and I like the 'pallet wood' stock sets for utility use just fine.
The lighter 12ga. loads, like 1 to 1 1/8 oz. and 2 3/4 to 3 drams equivalent, 7 1/2 and 6 shot will be pretty good and useful. It's harder where I am to find light loads though they are out there if you look for them.