Mike-lf your 629 Classic has removable FRONT sight blades they
can be easily switched or replaced as you see fit.. The height
is written on them... ex--.227''--.250''--.199''
They are available from S&w or Brownell. We silhouette shooters
can change the front sight out between banks of targets quicker
than trying to count clicks.. Push on your front sight with your
finger... lf it moves forward with tension you can switch them
in app 15 seconds... They aren't cheap. App $20 apiece... Last
til you lose one:-( Little springs and holder can get gone too.