BDC 600 Reticle: Developed specifically for the trajectory of the .223 Rem 5.56 NATO round with 55-grain polymer tip bullet, the new BDC 600 reticle offers shooters unique open circle aiming points and hash marks from 100 to 600 yards.
Eye Box technology: Every model features an impressive 4-time zoom range and four inches of constant, non-critical eye relief. A massive ocular lens delivers a huge, exceptionally bright, high-resolution sight picture.
One-piece main body tubes: For minimum weight and maximum strength and durability.
Ultra ClearCoat® optical system: Nikon has engineered the entire optical system to provide the shooter with a bright, sharp, incredibly flat sight picture and light transmission up to its theoretical maximum—95%.
Smooth zoom control: Magnification reference numbers are viewable from the shooter’s position.
Waterproof, fogproof, shockproof: Nitrogen-filled and O-ring sealed.
"While at the range I used a laptop to consult Spot On (Nikon also offers an iPhone app of it). After brief trial and error, I found that from a 230-yard zero, the SCAR/3-12X 42 mm BDC scope combo would produce dead-on hits at 100-yard intervals from each of the five ballistic circles, thereby providing positive aim points out to 700 yards. There are hundreds of .223 Rem. loads from 15 ammunition and bullet makers listed in the site’s pulldown displays, along with thousands of additional loads from calibers ranging from .22 Long Rifle to .577 Tyrannosaur, and users can also key in handload data. In addition, Spot On provides wind drift references, trajectory paths and ballistic tables, all easily printed from a computer." John Zent, American Rifleman magazine, 10/25/2011