I just bought a Combo at Gander Mountain that puzzels me. I like it, but it is odd. The Model number on the box is SB1-G15. It is a 12ga with 24in Mod. barrel and Accy barrel is 24in rifled barre. This is what is on the tag on the box. One barrel is stamped Cylinder Bore, it has rifle sites and is rifled. The other barrel is stamped Modified and measures .712 I.D. at the muzzel. (measured by the gunsmith at Gander Mountain) According to some charts this makes it a little more open than Modified. HELP ! Does anyone know what I am dealing with here? I have seen Tracker II's in the store where the barrels were stamped Cyl.Bore. Do they only stamp them as Rifled if it is the Ultra Slug gun? Also, I cannot find anything on the NEF site or catalog or papers with the gun that lists a 24 MOD. Barrel.