Samson SP Rear Top Mounted Deployable Rear Sight Black. 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. Same Plane Aperture Attaches to any 1913 Picatinny rail Perfect (M4) co-witness height Stainless steel clamp Just over 0.5 MOA per click windage adjustment Precision laser engraving Specifications for Samson SP Rear Top Mounted Deployable Iron Sight: Manufacturer: Samson Color: Black Additional Features: M4 Co-Witness Condition: New Sight Mounting Orientation: Top Mounted Sight Position: Rear Gun Model: AR-15 Gun Make: AR Platform Front Sight Color: REAR SIGHT ONLY 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 SP Rear Sight What firearm models does the manufacturer say Samson SP Rear Top Mounted Deployable Iron Sight is compatible with? The manufacturer says that Samson SP Rear Top Mounted Deployable Iron Sight is compatible with AR-15Samson 02-00031-01: SP Rear Top Mounted Deployable Rear Sight Black