I havethe Nikon Pro-Staff 2-7x 32mm shotgun scope. I use it on a Rem 870 with a 23" rifled barrel mounted on the cantelever scope mount. It is a very nice/accurate scope. Ilike the Hornady SST slugs. First time hunting with it last fall, I shot a large whitetail right through the heart at 110 yards while sitting in a tree stand.

Scope costs around $130.00.

http://theopticzone.com/detail.aspx?ID=2320