Tapco Tritium Sight Features The Tapco Tritium Sight uses a tritium insert to deliver a consistently bright aiming dot whether the shooter is indoors in low light or outside after dark. Surrounding that insert is a daylight-fluorescing material that captures ambient light to maintain visibility during bright daylight hours as well. Built from steel the sight is designed to withstand the recoil and wear of regular range use without losing its zero. Its black frame gives it a low-profile tactical appearance that matches the rest of a Sig Sauer P-Series pistol. Designed at optic height this sight achieves a lower one-third co-witness with a slide-mounted red dot letting the shooter see the iron sights through the lower portion of the optic window. This obscures less of the window than a full co-witness setup while still allowing three-dot sight alignment if the optic ever fails or runs out of battery. As a dedicated backup sight for red dot equipped pistols it gives shooters a reliable fallback without requiring them to remove their optic. The Tapco Tritium Sight is for sale at GrabAGun for Sig Sauer P-Series owners who want a dependable co-witness backup sight. Tapco Tritium Sight Specifications Manufacturer: Tapco Model: Tritium Sight Frame Material: Steel Color: Black Style: Optic Ready Compatible Hosts: Sig Sauer P-Series Available At: GrabAGun