Yes sr , i have a Zeiss Rapid-Z (800) , base screws are not an issue , as crazy as it sounds it only happends after first round is fired . i hunt in an area that has a very hi # of cats , wolfs n grrrrrr bears , this is not a good problem to have , On a good note the Canadian dealer rep is taking the gun back . That is amazzzzzing Customer service , cant wait to hear his reply .