XS Sights XS Standard Dot Fits Vent Ribbed Shotgun Barrels Green Dot. The XS Vent Rib replacement bead is bright durable and an easy DIY install for all shooters. The universal fit design utilizes a friction tapper lock design that will securely hold the bead on the barrel for countless hunts or thousands of clays. The brass post comes in three sizes to cover the majority of shotgun threads available. The green or orange photoluminescent Ember Glow Dot is brighter than fiber optic light pipes in daylight and the dot glows in low light to enhance visibility during dusk or dawn hunts. Specifications for XS Sight Systems Standard Dot Shotgun Tritium Night Sights: Manufacturer: XS Sight Systems Color: Black Rear Sight Color: Green Gun Type: Shotgun Illumination Type: Tritium Illumination Color: Green Handle Color: Green Finish: Matte Photoluminescent glow dot absorbs ambient light and glows in low light Sight optimized for waterfowl and turkey hunters or clay shooting Easy DIY install no specialty tools needed Durable and reliable will withstand countless hunts and stay on the gun Package Contents: XS Sight Systems Standard Dot Shotgun Tritium Night Sights