Get ready for your next hunt with the SIG SAUER Electro-Optics Sierra3 BDX 3.5 - 10 x 42 Riflescope. Using SpectraCoat™ lenses, this riflescope reduces glare and increases light transmission for clarity, while the Integrated BDX™ technology uses ballistics, environmental conditions and Bluetooth® technology to illuminate the holdover dot. The KinETHIC™ energy transfer indicator lets you know when the target's energy drops below a specific threshold, and the auto LevelPlex™ technology increases digital level sensitivity for longer shots.