A golf putter that enables dual configuration, namely sighting & play modes whereby the golfer can view both the ball and the hole by means of a mirrored surface, but which is reversible so that the golfer can play within tournament rules. A removable mirrored training aid has a reflective side and can be removed, flipped to a non-reflective side, or simply replaced with a same-weighted non-reflective plate, for use in actual (non-practice) golf play. The golfer can practice his or her stroke while observing the image of the ball and hole in the mirror, and thereby imprinting the correct stroke mechanics into muscle memory. Then, after the golfer has reversed the re-attachable mirrored surface plate to present its non-reflective side, the golfer can use the putter in a round of golf.