I have a used 32" ASE90 gold barrel that will fit an SO 5-or6. It weighs 1580KG has seminole flush [no notches] chokes 2 SK, 2 lt.mod, 2 imp. mod.
It is in excellent condition and is $3000.00
If interested in a true SO barrel I have a new 32" optima bore with extended chokes for $7000.00. "SOLD"