The pm2 3-27x56 has a great mag range (3-27) and really good fov at 3x. perhaps useful in some operations. At 3x the p4f turret at least was unusable. This design also makes it suffer optically at max mag. There is always give and take? The parrallax is also a little more touchy. I opened a pm2 dtmtc turret and it is nothing magical. The caps are o ring sealed and like every other turret. I don’t know what should make the pm2 turrets tougher... the scopes are divable, not sure if ZCO is... the Steiner M is also marketed as made for military use, same with a lot of the brands, that does not make them inherently tougher. . All of these scopes are tanks though.. are you sure you are not confounding “made for military use” with “having large military contracts?”..it is not the same..that is as much about production volume, military tradition and contact networks as quality and features..perhaps most of all what existing nv equipment etc they have that’s are plug and play compatible with the scopes.. like a lot of snipers still use .308 in spite of it performing sub par... logistically it is the best... With all this said, I have had hd2, kahles 525, various pm2s, and now ZCO. The pm2s, especially the 3-20x50 are a good second for me. I like the locking turret system on the pm2 better than the one one ZCO but that is minor, everywhere else ZCO wins... for me.