Describe:This Unity metal riser mount features built-in standard-height backup iron sights, keeping the weapon clean and uncluttered without compromising performance. Both front and rear backup iron sights are fully adjustable for windage and elevation. The front front sight post is removable, allowing the rear BUIS hole to be used with conventional front sights (such as our FUSION fixed or folding front sights, if available), creating a more traditional aiming baseline. The built-in front and rear BUIS are ideal for use as backup sights on ultra-short PDW/SMG platforms, where rail space is crucial for mounting illuminators and lasers. Compatibility:Aimpoint® Micro (H1, H2, T1, T2, CompM5).Vortex® Optics Crossfire.Sig Sauer® Romeo4T.Holosun™ 503. Material: Metal Interface: Micro Interface Size: 53*21*51mm Rail: 20mm Package List: 1 * Unity Metal Riser Mount