Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear FDE One Size. The TROY 45 Degree Folding BattleSights fold compactly to both sides of the rifle. With an ambidextrous sight base TROY 45 Degree BattleSights work seamlessly with magnified optics. Easy to install and deploy these sights position apertures at factory height. A stainless-steel cross-locking system ensures sight remains upright and zeroed under extreme combat conditions. Note: Sight is designed to work on same plane rail systems only. Will not work with a railed gas block that is higher or lower than the receiver. Specifications for Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear: Manufacturer: Troy Fabric/Material: Stainless Steel Hardened Aircraft Aluminum Mil-Spec HardCoat Anodized Gun Model: AR-10 AR-15 Gun Make: AR Platform Front Sight Color: Black Rear Sight Color: Black Illumination Type: Tritium Gun Type: Rifle Hand: Ambidextrous Additional Features: Durability Gender: Unisex Seasonal/Temperature Use: All Seasons Application: Duty Everyday Hunting Sports Work Tactical Size: One Size Quantity: 1 Pair Age Group: Adults Features of Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear Tritium Ambidextrous sight base Sight is designed to work on the same plane rail systems only Package Contents: Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear What firearm models does the manufacturer say Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear is compatible with? The manufacturer suggests that Troy Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear is compatible with AR-15 AR-10Troy SSIG-45S-HRFT-TR: Tritium 45deg Flip Up Offset Sight Set HK Front & Round Rear FDE One Size