NcStar Mark III Tactical Gen 2 3-9x 42mm Rifle Scope - Mil-Dot - The NcStar Mark III Tactical Series 3-9x42mm Rifle Scope is great for all types of tactical situations. It features green and blue illumination, with multiple brightness settings for each color, fully multi coated lenses, improved Locking Quick Release mount and Scope Centerline height, raised to AR15's 1.5in scope height. Scope has lowered BDC Turret height for lower mounting height for the optional 34mm Micro Dot mount and optic.