The co-witnessing 1.53 RMR footprint High Riser allows you to mount RMR footprint pistol optics to any rifle or shotgun with a Picatinny Rail. The CNC machined 6061-T6 Aluminum with Matte black Type 2 Hard Anodized finish ensure a solid direct slide-to-optic connection. Comes with mode-specific screws with Loctite pre-applied, T10 Allen wrench, 1x3mm Hex wrench, two #6-32x9 screws and two 4-40x7.2 screws.