Most of the scopes that do work were built with impacts in mind. Nightforce specifically was made because they wanted an “unbreakable scope” after so many failures in Lightforce scopes; the Leupold M3 Ultra and Mark 4 fixed powers came about through the US Army’s testing of the M24 and every scope failing to maintain zero when parachuting- Leupold said they could make a scope that held zero, and they did. The SWFA was a Tasco branded scope, that won a military trial for 50cal optics- it was made to hold zero from impacts. Trijicon newer scopes seem to do ok, and there again the company is testing for impacts. etc, etc.