I would guess very late, around 1999 or possibly later, as these were made under contract and it could have been built/shipped even after they were no longer catalogued by S&W.....call them and they will give you the ship date.....you should also be aware that a S&W auto with adjustable sights that was ordered as a law enforcement gun is not common at all, the vast majority were fixed sight models, you have one sweet forty there, congrats.....