If you hold the barrel in a vise with padded jaws(to avoid finish damage) it is much easier to drive those sights out. Hold the barrel in the vise with the sight being removed as close as possible to the vise jaws. A bit of brass welding rod will provide the needed punch. Be cautious when using a brass screw, most are just brass PLATED steel.. Use solid brass only... A bit of anti-sieze will make installation easier. If none is availoable any high pressure lube will work(Choke tube lube, STP oil treatment, sizing die lube,etc.), a little bit'l do ya.. Those firber optic sights may be made from aluminum so be extra careful to avoid finish damage.. I have a set clamped to the rib on my Browning 10 GA. turkey shooter...really are a help..