My wife has a Perazzi 12 gauge SC3 skeet gun, choked SKT and SKT, with all the sub-gage tubes in her 29-1/2 barrels. She would also like to shoot Sporting Clay and Trap with the same gun. I found a 31-1/2 barrel in Mod and Full, but how will I know if it can be fitted to her receiver? What questions do I need to ask the seller?