The Sierra3 BDX is a compact and lightweight riflescope designed for ultralight weight rifle, shotgun, muzzleloader and crossbow configurations. With the power of the included BDX technology, it provides your exact holdover dot location on targets when coupled with a BDX capable KILO rangefinder. Featuring exceptional SpectraCoat lenses, LevelPlex digital anti-cant, and KinETHIC kinetic energy transfer indicator, the Sierra3 BDX is incredibly simple to use.