This StrikeFire extra-high ring mounts on Picatinny rails. Recommended for mounting red dots or larger scopes on the Ruger Precision Rifle® and AR-style rifles. Positions the center of the optic at a height of 1.46 inches (37mm) from the base for absolute co-witness on AR15 platform. Carry handle versions of the AR15 require the low ring and a carry handle-mounting rail for the StrikeFire red dot. Sold one ring per package. Made by Vortex®.