Nightforce scopes are subjected to abuse during product development that would quickly destroy lesser optics. Preproduction scopes are tested in a pressure tank simulating 100 feet of water for 24 hours, ensuring absolute waterproof integrity. They test thermal stability by freezing them to -80o F, then heating them to 200o F within a one-hour period. Function is checked at both temperature extremes. Recoil and impact are tested at 1,250 Gs for both positive and negative forces.
Before it is shipped to a customer, every scope is completely inspected and checked at 70 to 130 different points, depending on the model. A battery of tests, including forward impact, side impact, tracking accuracy and resolution integrity. These are but a few of the steps nightforce take to insure absolute quality before any scope leaves their facility.
Whatever you think you might do to your scope, chances are They’ve already done it.
The hole you see in the well used Nightforce 3.5-15 x 50 NXS scope (Main Image) was made by an enemy 7.62x39 round fired at a U.S. soldier. The bullet completely penetrated the erector tube which is the heart of the scope's optical system. We’re happy to report that the soldier was not injured, and the only casualty is the scope's magnification ring, frozen on 15x. Its focus, tracking, and all other functions work just fine. It still holds point of aim like new. The soldier wrapped the scope in duct tape to keep out sand and dirt, and used it without a problem for the next three days, completing his mission.
Nightforce receive many stories like this. Since Nightforce riflescopes are used in active theatres by most of the elite special forces worldwide, they are subjected to and survive the most brutal conditions imaginable. Nightforce aren't saying they're scopes are bulletproof but there is at least one soldier, however, who would argue otherwise.