Hankins rail is supposed to fit a Optima even though its made for the scout. It machined from 7075. Thats what i dont like about EGW. They dont make a HD model in steel or 7075 for hardly any ML other than stuff like Savage or RemUML. No Scout HD rail either. All made from extruded 6061.
Contessa makes a steel Scout rail also but good luck finding a US source for it. EuroOptics is a Contessa dealer and might be able to get them. They make nice stuff too.
DNZ Game Reaper is made better than the Durasght OEM 1 piece but similar.
Durasight is some alloy and its probably a sintered material like Warnes rings. Not sure you can do that with zinc/aluminum alloy or not. Works with steel.
Only thing on the Hankins is the rail does not come back as far so i bet a long eye relief scope will be a must. The rail set back further on a Scout.