The Arisaka EOTECH EXPS Mount Mk2 is designed for the EOTECH EXPS3 and EXPS2 holographic weapon sights. The OEM mount has a centerline optic height of 1.725", making it impossible to align at 1.93" or requiring the use of a riser to get to 2.26". The Arisaka Mk2 mount completely replaces the OEM mount, alleviating the need to use a riser, saving weight, and providing a 1.93" optic centerline height.Features :Direct Replacement for OEM MountCompatible with All Reticle Variants of the EXPS3 and EXPS2CNC Machined 7075-T651 Aluminum"1.93" Optic Height"Will Not Fit EXPS3 HD, XPS3, XPS2, 518, 558, 552, or 512