Sig Sauer BDX is the newest in electro-optics technology. BDX or Ballistic Data Xchange technology is found in the new Sierra3BDX and Sierra6BDX riflescopes and KiloBDX rangefinders. To get the most out of your BDX products you can also download the SIG SAUER BDX app on Android and Apple devices and receive information via Bluetooth. The BDX allows for both accuracy and simplicity. About Sig Sauer From humble beginnings as a wagon to factory to one of the world’s largest firearms, optics, and ammunition manufacturers; the history of Sig Sauer is rich in innovation and achievement. After winning a contract from the Swiss government in 1864 for their Prelz-Burnand muzzleloading rifles, the Swiss Wagon Factory change its name to Schweizerische Industrie-Gesellschaf, the Swiss Industrial Company, better known as SIG. In 1949 SIG developed the SIG P49, the predecessor to the P210 and continued developing small arms for the Swiss military and police. Since then the company has changed its name, acquired other firearm manufacturers, and crossed the Atlantic—setting up headquarters in New Hampshire. However, what hasn’t changed is the innovative spirit that has driven SIG SAUER to develop firearms like the SIG516 rifle, MCX rifle, P320 pistol, and P226 pistol. With clients like the Texas Rangers, United States Secret Service, Navy Seals, and dozens of local law enforcement agencies nationwide; SIG SAUER is there When It Counts. OPEN BOX DEMO Sig Sauer SIERRA6 BDX 5-30x56mm, 34mm, SFP, BDX-R2 Digital Ballistic Reticle, 0.25 MOA, Black Riflescope SOSBDX65111 - Excellent Condition USED10301