Convert your SJC C-more Sideways mount or three piece SJC micro dot mount into a SJC three piece Upright C-more Mount. Works for both the Glock and M&P models. Does not work on one piece microdot mounts. By Simply Removing the sideways and or top plates from your current SJC Mount and replacing with the supplied top plate you can easily mount your c-more dot sight to a fixed SJC platform in the upright position. Ejection pattern tuning and ejection port lowering may be required for flawless function. The product depiction is not exact, but closely approximates the final product's configuration less the new top plate's mounting screw holes.