Hey guys,
I just inherited a sportsman 48 from my dad, and I'm looking to do some changes to it, namely the barrel, and the chamber. The chamber is only a 2+1 right now, but if it's possible I'd like to get it at least a 4+1. And about the barrel, I'd like to shorten it, to at least a 20". Is that possible with this type of gun, and if it is, what parts would be compatible?

Thanks for the help.