Designed for plane rail systems, Troy 45 Degree Folding Battle Sights are used by tactical experts the world over. These AR 15 Parts from the pioneers at Troy Industries feature dead-on accuracy for more exacting shots. With HK front and round rear compatibility, the Troy Black HK Offset Sight Set is the ambidextrous answer to bulky modifications. Install yourself, or with the help of a gunsmith. Remain upright and zeroed in at all times with Troy Front and Round Rear Iron Sights. Specifications for Troy 45 Degree Folding Battle Sights HK Front/Round Rear Iron Sights: Manufacturer: Troy Color: Black Additional Features: Dual Aperture Condition: New Sight Mounting Orientation: Offset Sight Position: Front and Rear Gun Make: AR Platform Front Sight Color: Black Rear Sight Color: Black Front Post Shape: Post Deployable: Yes Fabric/Material: Hardened Aircraft Aluminum, Stainless Steel Front Material: Aluminum Illumination Type: Non-Illuminated Gun Type: Rifle Included Accessories: 1 screw Illumination Color: None Hand: Ambidextrous Finish: Mil-Spec HardCoat Anodized Attachment Type: Picatinny, Weaver Mount Type: Weaver Country of Origin: USA Features of Troy 45 Degree Folding Battle Sights, OY-IRN-TRY201 Fits: HK front and round rear Color: black Durability and dead-on accuracy Package Contents: Troy 45 Degree Folding Battle Sights HK Front/Round Rear Iron Sights, OY-IRN-TRY201