All sets feature a bright red, fiber optic, front sight and fully adjustable peep or U-notch, rear sight. U-notch, rear sight sets use the highly accurate, 3-dot pattern with two green, fiber optic dots at the rear for sharp contrast and quick sight acquisition in all light conditions. No drilling or tapping required for most rifle models. Dovetailed front and rear sights may require minor fitting. For Marlin and Winchester lever action rifles. FP sight sets have a Foolproof, micro-adjustable, peep sight and red, front Fire Sight. Peep mounts to existing holes in top or side of receiver, depending on model. WGRS-336 includes a compact, low profile, peep sight and red, front Fire Sight. Fully adjustable peep mounts to the rear scope mount holes for easy installation.
Big Book Catalog, Issue:72, Page:308