Fully multi-coated lenses gives you better light transmission to bring optimum brightness and true color across the entire light Spectrum
Xpl coating gives you an extra protection on the exterior lenses from dirt, oil and scratches
Aircraft grade aluminum tube that has exceptional strength and superior mechanical integrity will protect these world class optics no matter what punishment you Throw at it
Argon purging gives you better waterproofing and thermal stability
Heat treated one piece tube gives the scope extra strength over multi-piece tubes. A one piece tube also is better at keeping moisture out thus keeping your scope fog proof for the life of the product