Matt, yes, it's got a Recknagel aperture sight, drilled out to 3mm. I have similar sights on all my CZ - except the .17... With a fiber optic front, it's the fastest thing this side of red dot thingies.
David, yes, Selby loved his .416, but this does not make the rifle/ammo more easily available to the masses... Even Selby had to set his 416 aside for some years due to scarcity of ammo. This said, he got his .416 because that's all what was available in the shop one day that his double got broken. Had he got a .425 Westley Richards, or .404 instead, he'd have loved any of those too.