The Williams™ 17778 WGRS-H&R  Receiver Peep Sight is specifically designed to fit the H&R 158, Topper and the Ruger Mark II. Williams™ WGRS-H&R Receiver Peep Sights offer shooters unmatched open sight visibility at longer distances than standard fixed open sights. The Williams™ WGRS-H&R Receiver Peep Sight is compatible with a front fiber optic fire sight. Williams™ Fire Sights gather ambient light and reflect it back to your eye, enabling faster target acquisition. Williams™ Sights do not use artificial light sources to create their sight visibility, making them legal to use in states that do not allow artificial light sources on your firearm while hunting. 

This Williams™ WGRS-H&R Sight Set 17778 fits the following firearms:

• H&R 158
• H&R Topper
• Ruger Mark II

The Williams™ Fire Sight Set 17778 DOES NOT fit any other firearms than those listed above.