I would go with a Bowen Classic Arms rear adjustable sight and a V notch is good for fast acquisition with a big dot front sight. I have a big dot McGivern gold sight on my 500 S&W magnum with a 6.5 inch half-lug barrel and it shows up over my Target Bowen Classic Arms rear sight with a target notch. My model 329PD 44 magnum has a V-notch rear sight and Mag-Na Port EDM'ed aka electrical discharge machined a vertical line in the blade and filled it with white to help line up with the front thin fluorescent red tube. I have a Mepro big dot tritium to use with it now though. Hope this helps.