USED XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium Shotgun Sights Mossberg 500 590 930 Matte Black Standard. will NOT fit Mossberg 590 Optics ready model. Specifications for XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium for Mossberg: Manufacturer: XS Sight Systems Front Sight Color: White Illumination Type: Tritium Gun Make: Mossberg Gun Model: Mossberg Model 930 Mossberg Model 590 Mossberg Model 500 Fabric/Material: Stress Proof Steel Anodized Aluminum Included Accessories: Big Dot Tritium Ghost Ring Shotrail Mount Type: Rail Features of XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium for Mossberg Shot Rail Anodized aluminum Compatible with Weaver or Picatinny rings Drop on installation (if holes are drilled & tapped into receiver) Ghost Ring Rear Sight Precision machined from stress proof steel Elevation & windage adjustment Big Dot Tritium Front Sight Precision machined from stress proof steel Big Dot Tritium front sight provides high visibility in all lighting conditions Package contents: XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium for Mossberg Hardware Kit What firearm models does the manufacturer say XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium for Mossberg is compatible with? The manufacturer suggests that XS Sight Systems Shotrail Ghost Ring & Big Dot Tritium for Mossberg is compatible with Mossberg Model 500 Mossberg Model 590 Mossberg Model 930XS Sight Systems MB-4000R-3: Shortrail Ghost Ring w/Big Dot Tritium Shotgun Sights Mossberg 500 590 930 Matte Black Standard