We do it that way for SMG's such as the Thompson, earlier Stens and Sterlings, GPMG's and modified Brens. Makes carrying and firing on the move easy. As for putting the butt on upside down and making the gun look stupid, it's easy. Just put the male part of the butt into the female part of the socket and then take wood off the bottom - now the top - so that the stock bolt in the butt fits into the threaded hole in the socket. You can do the same with a Bren if you try!