Just to clarify do you mean at home when not in use or what

Obvious answer is get a gun cabinet, or you could make a simple L frame stand.

Make sure the stock is sitting flat on the floor, so it can't fall forward or back only side to side, have it as close to vertical as possible, maybe 10-15 degrees, with a slotted barrel support.

The barrels are quite solid provided you don't lean it at much of an angle.

You can also buy magnetic or suction cup stands for propping guns & fishing rods against cars, same rule applies - as close to vertical as possible.