Those scopes look well built and pretty tough-- I'd like to look behind one. Speaking of tough scopes. I remember one day at Dam Neck for DM School, we had the students cleaning guns in the armory parking lot after a morning shoot. At one point, and I'm still not sure why/how, one Marine had his DMR (w an Unertal) driven over by a deuce-in-a-half. The driver didn’t know it was there and he just rolled right over it in its gun bag. After we wore out the student and driver, we took the gun down range to the 100 yard line,, and within a magazine we were back on target! Credit to the M14 and the unertal!