I have the 329 PD with 4" barrel and titanium cylinder .44mag...
Same V notch rear sight, but a fiber optic front.
Hit up Midway Usa or similar...or even S&W directly for the more traditional rear sight. Made a world of difference for me.
That being said...fun revolvers, aren't they?
I've got about 500rnds through mine since purchase last Aug...my hand goes numb much faster than shooting a full size .500.