Sig Sauer SIERRA3 BDX Riflescopes packs the power of the SIG SAUER BDX Ballistic Data Xchange (an incredible rangefinder-riflescope system that illuminate the exact holdover dot by using ballistics, environmental conditions, and Bluetooth) in the form factor of a traditional riflescope. When a hunter combines this riflescope with a BDX capable KILO rangefinder, he/she will get an illuminated auto-holdover dot on targets. Sig Sauer SIERRA 3 BDX Scopes feature exceptional SpectraCoat lenses, KinETHIC kinetic energy transfer indicator, and LevelPlex digital anti-cant, making it incredibly simple to use. Sig Sauer SIERRA 3 BDX Riflescopes for sale at Scopelist come in multiple variants: 2.5-8X32 mm, 3.5-10X42 mm, 4.5-14X44 mm, 4.5-14X50 mm, and 6.5-20X52 mm. Take a closer look for more information.