Primary Arms Riser Mount with spacer 1/3 co-witness

Rifle AR Plattform, GLx Mount 1/3 Cw-Cowitness MicroDot Riser Lightweight 6061-T6 Alu Black, M1913 Picatinny Style, fits SLx Microdot Sights from Primary Arms, height 1.64/41.65mm and/or with the enclosed Spacer .125/3.18mm height 1.765/44.83mm, Quick Release Cross Bolt, Code SKU PA-GLX-RM-L13-S – MPN 910089 Primary Arms USA.