Taken from Nightforce Website
"Our riflescopes are subjected to abuse during product development that would quickly destroy lesser optics. Pre-production riflescopes are tested in a pressure tank simulating 100 feet of water for 24 hours, ensuring absolute waterproof integrity. We test thermal stability by freezing them to -80ºF, then heating them to 160ºF within a one-hour period. Function is checked at both temperature extremes. Recoil and impact testing for positive and negative forces is conducted at 1,250 Gs."
Nightforce is on the cutting edge of the optics market. Oakland Tactical maintains a large stock of Nightforce products. Call us or come in to the store if you have any questions!