ROUND BUTT Frame models number Models 30, 32, 33, 34, 36, 37, 38, 43, 49, 50, 51, 60, 63, 317, 331, 337,
351PD, 360, 431PD, 631, 637, 638, 649, 650, 651
Will NOT fit polymer bodyguard models.
SQUARE BUTT Frame models number Models 30, 31, 32, 33, 34, 35, 36, 37, 43, 50, 51, 60, 63, 651