They fit very similar to an 870, but not perfect. I can shoulder my 870 to where I need it very easily. With my V3 I think I’m pointing a little high and right. A stock shim kit would fix this but this rumored part is very much a unicorn, talked about but never a reality.
I was experiencing some blowback in to my face with mine. It’s not the best solution but I used a bit of hockey tape between the forearm and barrel, and also covered the forearm vents.
Where I go out I could be shooting ducks, geese, pheasant, or whatever else in the same trip. The versatility of the V3 has been great, the feel is great. It’s light shooting recol, even with Hog Hunter 3” rounds makes it easy to shoot. Easy to strip down and clean.