I installed a “budget” Burris Tac30 1-4 on my build. As you can see from the photo, it survived some rainy, muddy abuse during a 10K running biathlon event. Even with a mud-smeared lens it still helped me hit a 500 yard gong! I learned later, after I had cleaned it off, that you have to be careful wiping the lens or it might scratch. I didn’t know any better at the time and went to town on it. But the lens never scratched, so I either got lucky, or Burris’s budget lenses are tough enough to handle my cleaning abuse at least once. I also lost a turret cap in the mud somewhere along the course, and Burris was kind enough to send me two free caps!
Burris makes better variable scopes than the Tac30, but thought I’d mention my experience in case it’ll help you decide on whether to go with a variable optic.