Nightforce NXT 5.5-22x50mm MLR reticle ZS HS Turrets This is the rare built like a tank Mil-Spec version. Came on a rifle I purchased. I went with less power for my application. In the right light you can see really faint ring marks on either side. Great scope in excellent condition. $1800 MIL-SPEC is engraved on the bottom of the riflescope saddle. ENVIRONMENTAL TESTING All MIL-SPEC riflescopes endure an external pressurization test of 40 psi “gauge pressure,” simulating a depth of 100 feet, to confirm that they exceed current U.S. military specification requirements by up to 25%. All MIL-SPEC riflescopes are tested again to guarantee that they are airtight. This is verified by a secondary external pressure test of 125 psi “gauge pressure” to simulate a depth of approximately 300 feet. This testing is critical to ensure the integrity of the internal components against the effects of rapid temperature and pressure fluctuations encountered by HALO (High Altitude, Low Opening)-type troop insertions, as well as covert waterborne insertions at submarine depth. All MIL-SPEC riflescopes undergo twice the amount of impact testing of a commercial NXS riflescope to ensure they can withstand abuse from the battlefield. All MIL-SPEC riflescopes are 100% inspected both before and after environmental testing procedures to ensure consistency, repeatability, and to prove the integrity of the product at every stage. MANUFACTURING PROCESS Mechanical components on all MIL-SPEC riflescopes are assembled in a permanent fashion to maintain product integrity when exposed to extreme shock and high frequency vibrations, such as full auto-fire and explosive environments such as I.E.D. attacks. All optical elements are bedded in a proprietary Mil-Spec bonding agent (no glass-to-metal contact). Tracking accuracy, dial accuracy, reticle tilt, maximum adjustment range, between-power deviation and adjustment backlash are all of higher standards on a MIL-SPEC riflescope. They exceed the already strict specifications of our commercial NXSTM product line, and are held to tolerances unmatched by any other scope manufacturer. OPTICAL QUALITY & PERFORMANCE All MIL-SPEC riflescopes are built using only the best optical elements chosen from each lot received from our lens element suppliers.