[Zack The Ripper]

There's actually some pretty good paintball holographic sights that are very shock resistant and are very durable. I used to paintball regularly and have taken multiple paint balls directly to the lens and furniture from very close distance and that bitch still works beautifully. They aren't very pricey either. Having something on a GBBR that is super shock resistant isn't required as most of the airsoft sights on the market are somewhat shock resistant, however you will have to resight from time to time. Even with "shock resistant" sights you will have to make adjustments from time to time, just less often. Either way they won't be major adjustments, just a couples clicks one way or another.