I'm talking about the bottom gun in the picture. Is this a type of sight that comes this way or has someone blended a Bo-Mar or other brand into the slide? I think it looks pretty nice and was curious how they did it.
Notice, back by the blade, there is no adjustment screw for windage. Normally, the captive end show's on the port (left) side, and here, it's solid or flush. Also, the rear blade appears to be pretty verticle, and not angle to the rear for glare reduction.
It may be a clone, something possible where the Bomar leaf is set into a special mount, but regardless, the blending of the mount to round the leading edge is a nice tough.
Still, the newer Low Mount versions of the Bomar's, and even Wilson's adjustable sight seem to sit much lower, and have less exposed area, providing a slightly cleaner look, rather than the "tumor" approach.