The AFG laser X takes into account natural body mechanics Recommended for X use only Mounts on standard 20mm picatinny rails Includes interchangable finger shelves: Flat or finger bump Provides better X control. Polymer design. Improves ergonomics. Increases speed and efficiency. Reduces fatigue. Fits all 20mm Picatinny rail equipped X Provides a comfortable and stable user interface that reduces fatigue and allows for more precise X control By positioning the user's hand high on the center line of the bore, the AFG helps mitigate recoil and control the X, facilitating faster, more accurate follow-up shots.