Scopes weren't designed to take physical abuse.
Back in the 1960/1970s Leupold had a scope and rifle pictured in an advertisement I believe in the NRA magazine along with the story of how the rifle and scope were lost in a pretty fast flowing western stream....I believe in a horse crossing.
The rifle and scope were found a couple years later the rifle and scope were trashed...the Leupolds internals were still nitrogen filled.
Unless someone has a better verified example of extreme use then I give Leupold the toughest scope award.
Zeiss is the only manufacturer that used to have a rubber cover over the front objectuve bell that I'm aware of.
Tough....can the scope take heavy recoil and remain zeroed.
