Smith & Wesson Magazine Catch Nut

FITS: 3913 LS/NL, 9mm; 3953 DAO, 9mm; 4006, .40 S&W; 4013 TSW, .40 S&W; 4043 DAO, .40 S&W; 4046, .40 S&W; 4056 TSW/DAO, .40 S&W; 4506, .45 ACP; 4516, .45 ACP; 4566, .45 ACP; 4586 DAO, .45 ACP; 5903, 9mm; 5906, 9mm; 5943 DAO, 9mm; 5946 DAO,;