OK let me first say as you didn't indicate if you were using a rifled barrel. A rifled barrel is absolatuly necessary for long range shotgun slug shooting. I have my Remmington 1100 set up just this way. Now one thing I found and didn't know when you change from a bird shot barrel to a rifled barrel you have to change forgrip of your shotgun the bird shot one is too tight. then if you get a B-Square mount it will mount with the trigger assembalie retaining pins. This is a simpal process that may take about 2 min. Now I don't use an exspensive scope I use a cheap Redfield that I bought at the Wal-Mart been fine for me. Now some folks say a straight 2X or a 4X is fine but I sure like a 3-9 power set between 5 and 6. The scope mounts with regular wever scope rings. Now it is very important to use a generious amount of lock tight as the recoil of a shotgun is excessive but comparied to a 7MM Mag its not that bad. I really like this set up I'm sure if you try it you will be hooked too. Mike