it does have the "Cutout". It is rather deep and can get debris into the frame. google.com/search?q=gen+4+g34+slide&source=lnms&tbm=isch&sa=X&ved=0ahUKEwixreDM9ZfbAhVBtVMKHcfaAbMQ_AUICygC&biw=1280&bih=618#imgrc=buddwuzV2lMEoM