I've never seen a target model with the front sight and base removed and replaced with the ramped rifle sight in it's place.
Is the underneath of the rear sight #d to the gun?
Jim:
The gun shipped as an Outdoorsman with a 6.5" barrel. The barrel does number to the gun (all the readily available numbers match, including the well worn and chipped stocks). I did not take the rear sight off, but I would expect that it would number as well. On the SWCA side, Roy gave me a date as an Outdoorsman, so I would assume that the front 2.5" were cut off (along with the front sight) and the new rib/sight was soldered onto the round of the barrel over the patent date roll marks.
Love the guns posted so far - some very cool modifications.