Samson Top Mounted Deployable Front and Rear Sight for Picatinny Black QF-EXT-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 - Gas Block Extended Height (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 Top Mounted Deployable Front and Rear Sight for Picatinny: 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 Fabric/Material: Aluminum 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 Extended Height HK Front/SP Rear Folding Sight Combo What firearm models does the manufacturer say Samson Top Mounted Deployable Front and Rear Sight for Picatinny is compatible with? The manufacturer says that Samson Top Mounted Deployable Front and Rear Sight for Picatinny is compatible with AR-15Samson QF-EXT-HK-SP PKG: Top Mounted Deployable Front and Rear Sight for Picatinny Black