The Williams™ 1400 5D-510  Receiver Peep Sight is specifically designed to fit the Remington 510, 511, 512, 513, and 521T. Williams™ 5D-510 Receiver Peep Sights offer shooters unmatched open sight visibility at longer distances than standard fixed open sights. The Williams™ 5D-510 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™ 5D-510 Sight Set 1400 fits the following firearms:

• Remington 510
• Remington 511 
• Remington 512
• Remington 513
• Remington 521T