I would recommend using ShareX instead, one click to fully automatically upload a full screen screenshot, bindable hotkeys for various other tasks, really good built in editor too
There already is more weapons going up the ranks to CPL. There is no need for cops to receive more guns, the current ones are good if used correctly and to their full ability @Bnjemann covered this in his reply really well.
If you feel you don't want to rank up to Cpl+ to receive the shotgun...