Figure I'd update! Pretty much just had to bump the action over my knee and "whalla " she opened. Little clp and now comes apart smoothly! It came with just the two chokes that were installed. I removed them to give them a little oil and looked for a marking of what choke size they were. Well they removed easily but we're not marked. I gave Ruger a call where according to the nice lady ,having 4 slots ,both were extra full! Being 1988 vintage the Shop Ruger website did not carry chokes for it. So a call to Briley ,who suppled chokes for Ruger, informed me the my gun took the short, flush length Winchester choke. So I ordered an Improved cly, modified and improved mod. So hopefully I'll be set! I did head to the trap,skeet field with both extra full chokes. Dang Canadian smoke affected my shooting! lol