I have a Winchester 101 Pigeon Grade 12 Gauge Skeet and was interested in some sub gauge barrels a gent had for sale. They came from a set and I was pretty sure that these sub barrels were made for a smaller receiver than the 12ga. I have. Can anyone of you experts in these guns either confirm or deny this? I would like to buy the barrels, but don't want him to ship them to me only to discover that they will not fit my receiver. Thanks a bunch, in advance for your help! Regards, Pete