The Thunderbolt does not come with a FO front sight so I am not sure where you are going with this?
The Seraphim version called the Archangel does come with a FO as standard. So do other Seraphim models and I have two of them including the Seraphim Warfighter. Depending on the model, you might also expect an ungraded trigger with an overtravel screw and high density black grips in lieu of the natural mahogany ones from earlier shipments.
That FO upgrade was worth at least $45 to me as I would have done the upgrade my self as I do with all of my pistols. Some of these things are purely cosmetic but that's not the case for me with the FO sight or the improved trigger as I'm trying to maximize the performance of my guns when they are used in competitions.


















































