Love my original 30” XS and agree with the comments that it is very barrel heavy. For me, 3 oz of weight in the stock and light Muller chokes and it balances on the hinge. It has proved 100% reliable over the years and I wouldn’t be without it.
As MartynB describes above, I installed my cabinet flat on the floor in a built-in double wardrobe in my new build property. Very secure with six bolts into the floor joists. This passed inspection no questions asked.