Williams Gun Sight HK Style Top Mounted Deployable Iron Sight Black. This sight set comes with a balckout finish to match most AR15 finishes on the market. This precision folding sight set features an upright positive lock with a steel locking pawl which prevents the sight from collapsing during any extreme shooting scenarios. The front sight carries a standard A2 front sight post which is compatible with any standardized rear AR sight. The rear sight contains a rotating peep sight providing the shooter with two different rear sight pictures. Specifications for Williams Gun Sight HK Style Top Mounted Deployable Iron Sight: Manufacturer: Williams Gun Sight Color: Black Sight Mounting Orientation: Top Mounted Gun Make: Heckler & Koch Front Sight Color: Black Rear Sight Color: Black Deployable: Yes Fabric/Material: Metal Front Material: Metal Gun Type: Rifle Included Accessories: Standard Weather Resistance: Yes Hand: Ambidextrous Mount Type: Picatinny Features of Williams Gun Sight Hk Style Picatinny Rail Set of Folding Sight: HK style front sight picture Click adjustment rear sight Rotating rear aperture at .200" and .075" internal diameter sizes Blackout anodized finish Upright positive lock with steal locking pawl Standard A2 front sight post CNC machined out of high-grade aluminum Package Contents: Williams Gun Sight Hk Style Picatinny Rail Set of Folding Sight Williams Gun Sight 683533: HK Style Top Mounted Deployable Iron Sight Black