4X fixed Simmons Pro-Diamond shotgun scope. The solid tube, fewer lens, make for lighter weight, fewer moving parts, less inertia to overcome, and coarser adjustments. They are designed for turkey guns, shooting 3 1/2 super mag loads, they work pretty well. They are about $65 at midway I think, you may find one as cheap close to you. It is also not necessary to use atomic level loads, unless maybe you are on a one shot grizzly hunt.