Holosun SCS MOS red dot mount Another clue is the year

Another clue is the year of production: the 2

Allows mounting red dots with Docter footprint on the factory OR interface

The X2 version adds improved glass clarity

M9A1 and M9A3 models

Picatinny rail [scope base] for Brno ZKM 451 models with 16 mm dovetail

Holosun SCS MOS red dot mount Another clue is the yearDirect fit for Glock MOS no adapter plate required. Essential info Compatibility: Direct fit for Glock MOS Reticle: 2 MOA dot & 32 MOA circle [green] Window size [height x width]: 14. 7 x 19. 5 mm [0. 58 x 0. 77"] Total dimensions [length x width x height]: 49. 0 x 26. 2 x 23. 1 mm [1. 93 x 1. 03 x 0. 91"] Long story short: Holosun SCS MOS is a red dot sight made to fit Glock MOS models without need of any mounting plate. It will fit the optics ready