Don't let its ubiquitous form factor fool you, because hidden inside the Sig Sauer 6.5-20x52 SIERRA3BDX Riflescope are technological innovations that use Bluetooth connectivity to compatible devices that will give you the cool confidence to make a precise shot and ensure an ethical kill—even at long range and in challenging light.
Anchored on a free app for iOS and Android smartphones, Sig's Ballistic Data Xchange (BDX) system allows you to bond your mobile device with the scope and one of their KILO laser rangefinders and then pool a slew of information to plot a firing solution that is updated and displayed on the BDX-R1 digital ballistic reticle. The rangefinder gives you range and angle to the target while the app allows you to input the ballistic profile of your round as well as critical environmental data such as temperature and wind direction and speed. All the information is used to calculate an accurate elevation holdover and/or windage adjustment, which is sent to the riflescope. A dot is projected onto the reticle's crosshairs and all you need to do is place it on the target and fire. The scope can also be used without a rangefinder, utilizing the ballistic profile and environmental data to plot multiple aiming points at various distances. Since the dot is projected onto the reticle, the app adjusts the subtensions to the selected magnifications so they remain accurate through the entire zoom range.
Optically, the SIERRA benefits from an exceptional zoom range and a massive objective lens that enables you to precisely send shots at long range while enjoying bright and clear views even in low light or if you have the scope set on max magnification. Extra-low dispersion glass and broadband anti-reflection coatings maximize light transmission with virtually zero distortion across the whole field of view with enhanced color fidelity, contrast, and resolution. Capped low-profile turrets adjust at a precise 1/4 MOA per click with 20 MOA of travel per rotation and an adjustment range of 40 MOA. To withstand the repeated recoil of regular use and to provide the adjustment room required for the windage and elevation turrets, the one-piece maintube is made of lightweight but strong aluminum and is robust at 30mm in diameter. The housing is nitrogen filled and O-ring sealed to an IPX7 rating to make it waterproof, submersible, and resistant to internal fogging.
Features
- BDX-R1 Digital Ballistic Reticle
- Ballistic Data Xchange (BDX) System
- Illuminated Aiming Points Set by BDX
- Bluetooth Connectivity to Smartphones
- 1/4 MOA/Click Impact Point Correction
- 40 MOA Windage and Elevation Adjustment
- ED Glass with Broad Spectrum Coatings
- Nitrogen Filled & IPX7-Rated
- MOTAC Motion Sensor & LevelPlex System
- Runs on Two CR2032 Batteries
Optical Performance
- Powerful 6.5-20x zoom magnification is ideally suited for mid ranges on lower power with the ability to place accurate shots at extreme ranges
- Massive 52mm objective provides the light gathering required to ensure views remain bright in challenging light or when viewing targets at long range on high magnification
- Extra-low dispersion (ED) and high-transmittance (HT) glass provides enhanced light transmission to produce bright and clear high-contrast views with accurate color
- Highly efficient, ultra-wide broadband, anti-reflection SpectraCoat lens coatings reduce surface reflections across the entire visible spectrum, improving light transmission
- 14-foot field of view at 100 yards on 6.5x power, 3.5-foot on 20x
- Second focal plane placement maintains a consistent reticle size regardless of the magnification selected
- Digital aiming point placement remains accurate at all magnifications
- 10 adjustable brightness settings ensure clear aiming point visibility in all light conditions
- Non-illuminated duplex crosshair design leaves most of the field of view open, clear, and uncluttered
- BDX information is automatically transferred to the riflescope and clear aiming points are placed on the hairs to indicate an adjusted elevation holdover and windage adjustment
- Place the dot on the target and fire for precise first-shot accuracy
- Ability to configure multiple holdover points that are all displayed to eliminate turret adjustments or other distance calculations
- Use without rangefinder to configure ballistic information and set a reticle profile with multiple holdover distances out to 800 yards
- Blue LED on the magnification ring blinks each time the reticle is updated
Technology
- Designed to provide hunters with the ability to take the most accurate and ethical shot
- Requires compatible rangefinder
- Riflescope connects to a smartphone running the Sig BDX app for Android or iOS
- Receives and makes automatic adjustments to the reticle aiming point placement to improve shot accuracy
- Through app, user can input round, load, muzzle velocity, and other ballistic information that is used to calculate aiming point placement
- User can choose to input environmental conditions, including temperature, wind speed and direction, and humidity that are used to adjust aiming point and improve accuracy
- Wireless Bluetooth connectivity with secure PIN accessibility to eliminate the possibility of interference with other Sig BDX apps and rangefinders being used by other hunters in the field or at the range
- Calculates the maximum effective hunting range
- Indicates when the round's energy may not be sufficient to ensure an ethical kill
- Helps to ensure an ethical hunt by indicating when a given round's energy drops below a threshold
- Threshold is set by the user in the BDX app
- Based on the ballistic profile provided and distance of the shot
- Can be activated in the field during a hunt
- Ensures the user is holding the rifle level to improve shot accuracy
- When activated, the system automatically increases digital level sensitivity for longer shots
- Utilizes an internal digital level that is more accurate than conventional bubble levels
- In-view indicators enable the user to precisely optically align the scope to their rifle and remove unwanted cant from the system
- ±0.5° of accuracy ensures the horizontal and vertical axes of the reticle are perfectly parallel to the rifle
- Immediately powers up reticle illumination when it senses motion
- Powers reticle down when it does not detect movement for 2 minutes to extend battery life
Use and Handling
- Capped low-profile turrets reduce snag and ensure dirt, dust, and water won't foul the adjustment mechanism
- Precise 1/4 MOA per click impact point correction
- Wide 40 MOA windage and elevation adjustment range with 20 MOA of travel per turret rotation
- Fast-focus eyepiece
- Objective lens filter thread allows the use of front filters, like polarizing or neutral density, to enhance the view
- Long 4.2" eye relief on low power and 3.4" on high provides a generous eye box to ease eyestrain and improve comfort
- Comfortable exit pupil at low to medium magnifications enables easy use in low or challenging light
Construction Details
- Large 30mm maintube maximizes light throughput to keep views bright and provides the room required for the windage and elevation adjustment range
- Lightweight and durable aluminum housing
- Reflection-limiting matte black anodized finish
- Nitrogen filled and O-ring sealed to an IPX7 rating, making it waterproof and submersible to 3.3' (1m) for up to 30 minutes and resistant to internal fogging when moving through extreme changes in environmental conditions and temperature
- 26-ounce weight
- Runs on two included CR2032 batteries