ok ODT faithful. Who among you knows which barrels are compatible? I have an older late 60's Wingmaster with a 30" barrel and Id love to to put a 26" or 28" on it. Its a 2 3/4 only. I have a 90's 28" spare but Im not going into this all half cocked. Ive grown fond of my hands and fingers and would enjoy keeping them all together for a little while longer.