Made for long-distance shooters and hunters who need first-round hits, the SIG Sauer Sierra3BDX riflescope pairs with the company’s unique BDX rangefinder to provide shooting solutions. Out to a range of 800 yards, the SIG Sauer Sierra3BDX riflescope pairs with the rangefinder and an app loaded with your unique ballistic profile. Once a target is ranged, the system calculates the shooting solution, and a bright dot appears in the reticle, showing shooters where to hold for a first-round hit. Second focal plane reticle Weight: 24.9 ounces 4.5-14x50mm size Adjustment value: 1/4 MOA Each SIG Sauer Sierra3BDX riflescope is loaded with all the features Mfg: Sig Sauer, Inc.