I had in the past installed large awkward looking big bell scopes on them but it just unbalances the thing too much for me. I was at a gun show and picked up a used minty looking shotgun variable for my current one. 35$. The straight tube lets me mount it real low onto the receiver. It is a 1.75-5X variable Tasco, of very good quality. And handily, I think shotgun scopes are parallax free at 50 yards instead of 100 like on big rifle scopes. It has the stepped crosshairs and works great for me. The eyepiece with the variable ring is larger than the one inch tube, but it hangs down behind the receiver slope so is not a problem for clearance with low mounting. You could keep it set to maybe 2X for quick shooting of varmints round the barnyard, or crank in the full 4-5X for like, squirrel hunting. This thing has nice clear optics too. I used the inexpensive Weaver rings to get down low on the mount. I think there is a Simmons shotgun scope that is comparable in some ways to this. My model is out of production but it was not an inexpensive one when new. Used shotgun scopes are not hard to get. Well in Ohio, where you use a shotgun for deer only.