I just came into an old Browning A-5 shotgun. By the serial numbers (279947), I think it was made in 1949. Stamped "Made in Belgium", and "Special Steel" 12 gauge, 2 3/4". The barrel is about 28.5 inches past the receiver. How do I know if it's a straight cylinder, or if it's choked? It doesn't have any thread at the end of the barrel. And I couldn't find any of the notches mentioned in an on line manual. My big question is whether this is a good gun, and safe, for shooting slugs. I'm only interested in pig hunting, and slugs are required many places around here. I'm new to shotguns. It's a beautiful gun-- engraved all over the place. Thanks for any help.