Can anyone offer some info on a FN/Browning Light 12? My buddy just received one from a neighbor. It is approx. 20+ years old, in 90% condition. It is a Light 12, chambered for 2 /34" with a vented rib barrel, manufactured in Belgium. The barrel was modified for what the old-timer called a "poly choke" that looks like a muzzle brake. I would like to know what it is worth, and if it is a rare shotgun. Also, are replacement barrels available? Any info is much appreciated, guys.