Samson HK Fornt/ SP Rear Top Mounted Deployable Front and Rear Sight Black QF-HK-SP PKG. Accepts all aftermarket rear aperture replacements with Mil-spec dimensions. All sights lock in the deployed position. It is not intended for lower height gas block rails. The durable construction and solid mounting system guarantees you to stay on zero. Package includes: Quick Flip Front Sight (HK) Quick Flip Rear Sight (SP) Features: Attaches to any 1913 Picatinny rail Perfect (M4) co-witness height Stainless steel clamp Precision laser engraving Specifications for Samson HK Fornt/ SP Rear Top Mounted Deployable Iron Sight: Manufacturer: Samson Color: Black Additional Features: M4 Co-Witness Sight Mounting Orientation: Top Mounted Sight Position: Front and Rear Gun Model: AR-15 Gun Make: AR Platform Front Sight Color: Black Rear Sight Color: Black Deployable: Yes Front Material: T-6061 Aluminum Illumination Type: Non-Illuminated Gun Type: Rifle Included Accessories: Standard Illumination Color: None Hand: Ambidextrous Mount Type: Picatinny Package Contents: Samson Quick Flip HK Front/SP Rear Folding Sight Combo What firearm models does the manufacturer say Samson HK Fornt/ SP Rear Top Mounted Deployable Iron Sight is compatible with? The manufacturer says that Samson HK Fornt/ SP Rear Top Mounted Deployable Iron Sight is compatible with AR-15Samson QF-HK-SP PKG: HK Fornt/ SP Rear Top Mounted Deployable Front and Rear Sight Black