Clear, bright, and tough, the Vortex Crossfire II line is built to exceed the performance standards of similarly priced riflescopes. Long eye relief, a fast-focus eyepiece, fully coated lenses, and resettable MOA turrets are hallmarks of the series. Crafted of premium, aircraft-grade aluminum, the waterproof one-piece tube delivers both optimum visual performance and strength. O-rings prevent moisture, dust, and debris from getting inside the tube. All Vortex Crossfire II riflescopes are backed by Vortex's VIP unlimited lifetime warranty. Vortex Crossfire II Features: Fast-focus eyepiece Fully multicoated lenses Waterproof aluminum tube construction Longer, more forgiving eye relief Vortex Crossfire II 4-16x50 AO Dead-Hold BDC Riflescope CF2-31039