As with all adm products this mount is rock solid - American Defense Manufacturing Holosun 509T QD Mount

purchased to replace the stock lower 1/3 mount for the holosun scrs. while this wont provide a standard absolute cowitiness height this brings the scrs low enough for proper cheek weld and good sight picture on both MP5 platforms (when used with UTG pro rail) or on top of my gen2 galil ace which inherently has a high height over bore. due to the footrpint differences between the scrs and 509t this mount extends beyond the base of the scrs slightly.

ADM products are great, i've never had any issues with red dot mounts, scope mounts, lowers, etc. Buy with confidence