GrovTec US 45 Degrees Picatinny Angled Rail Black. The angled rail has a Type III black anodized finish that is designed for mounting secondary sights. Specifications for GrovTec US PAR 45 Degrees Picatinny Angled Rail: Manufacturer: GrovTec US Color: Black Finish: Type III Hard Coat Anodized Condition: New Cant: 45 degrees Features of GrovTec US PAR 45 Degrees Picatinny Angled Rail An 45 Degree Offset Picatinny Rail Designed For Mounting Secondary Sights Low Profile Mounting System Package Contents: GrovTec US PAR 45 Degrees Picatinny Angled Rail GrovTec US GTSW321: 45 Degrees Picatinny Angled Rail Black