Im looking for a rifled slug barrel for a sears roebuck M 20...

Im looking for a rifled slug barrel for a sears roebuck M 200 12 ga. The one i have on it now is a smooth bore full choke chamberd for 2-3/4 in.
Any help or point me in the right derection would be greatly apreshated.
Thank You.
Barry,

hello the winchester model 1200 barrel will fit i beleive ,,the 200 was a sears brand made by winchester and was a copy of the 1200 so you should be able to find a slug barrel for a 1200,,120 or 200 ,,mabey try gunparts corp online ,,i think they may have some barrels or look on gunbrokers.com and search "winchester"there will be a bunch of hits for guns and parts but you should be able to finsd something there ,,sometimes if you try to narrow your search like with winchester shotgun barrel you won't get any hits ,,best to just search 1 word phrases and just look thru the listings ,,you may find a whole or parts gun as cheap as a barrel,,also i've talked with guys who have bought rifled chokes and they say they shoot as good as a fully rifled barreland the cost is much cheaper than a rifled tube ,,so thats something to think about also,,
bigcurt

Thank You for the info bigcurt.Ive never seen a rifled choke is it like a regular choke tube that screws in the end of the barrel? or is it bilt into the barrel.
Thank You.
Barry,