The SIERRA3BDX 2.5-8x32mm is a compact and lightweight riflescope designed for ultra-lightweight rifle, shotgun muzzleloader, and crossbow configurations. With the power of the included BDX technology, it provides your exact holdover dot location on targets when coupled with a BDX capable KILO rangefinder. Featuring exceptional SpectraCoat™ lenses, LevelPlex™ digital anti-cant, and KinETHIC™ kinetic energy transfer indicator, the SIERRA3BDX 2.5-8x32mm is incredibly simple to use. Range a target, put the holdover dot on target, pull the trigger, impact.
Features
- Integrated BDX™ Ballistic Data Xchange. A rangefinder and riflescope system that uses ballistics, environmental conditions and Bluetooth® to illuminate the exact holdover dot.
- Automatic holdover dot on a Digital Focal Plane™, combining Second Focal Plane stadias, with an OLED illuminated ballistic holdover dot that automatically scales with zoom to subtend on target at any magnification level.
- The updated SIG BDX App now include profiles for crossbow ballistics, through entering bolt weight and speed.
- Features our MOTAC™(Motion Activated Illumination) that powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced battery life
- SpectraCoat™ highly efficient, ultra-wide broadband, anti-reflection lens coatings reduce surface reflections to extremely low levels across the entire visible spectrum providing superior light transmission
- SIG SAUER’s innovative KinETHIC kinetic energy transfer indicator. KinETHIC provides assistance in assuring an ethical hunt by indicating when energy on target drops below a threshold that can be set by the hunter using the SIG BDX App.
- New for BDX riflescopes, Auto LevelPlex, automatically increases digital level sensitivity on longer shots
- Dependable waterproof (IPX-7 rated for complete immersion up to 1 meter) and fog-proof performance
- The SIERRA3BDX is covered by SIG SAUER’s INFINITE Guarantee™ and Electronics Limited Warranty, see website for full details
- SIG BDX APP Now includes the ability to create multiple profiles for both firearms and crossbow ballistics.
Specifications
| Magnification | 2.5-8x |
|---|---|
| Objective Lens Diameter | 32 mm |
| Overall Length | 11.6 IN |
| Weight | 19.4 |
| Illumination Settings | 10 Daylight |
| Maintube Diameter | 30mm |
| Total Elevation Travel | 80 MOA |
| Total Windage Travel | 80 MOA |
| Travel Per Rotation | 20 MOA |
| Parallax Setting | 100 Yards |
| Eye Relief Low (IN) | 4.21 |
| Eye Relief High (IN) | 3.46 |
| Field of View Low (FT @ 100 Yards) | 39.8 |
| Field of View High (FT @ 100 Yards) | 13.2 |
| Diopter Adjustment Range | +/- 2 |
| Internal Gas Purge | Nitrogen |
| Objective Outer Diameter | 1.55 |
| Ocular Outer Diameter (in) | 1.61 |
| Color | Black |
| Mount Included | No |
| Battery | (2) CR2032 |
| Focal Plane | Second |
| Reticle | BDX-R1 Digital |
| Illumination | Yes |
Infinite Guarantee
SIG SAUER Electro-Optics are guaranteed forever. It's an unlimited lifetime guarantee.
LensArmor™
Abrasion-resistant lens coatings for extreme durability ensure the lenses on your scope will stay sharp, bright, and clear.
LenShield™
Proprietary Mil-Spec oleophobic coating that sheds water, oil, and gunk to ensure a clean sight image at all times.
Motac™
Activated through motion sensing technology, MOTAC immediately powers up illumination when it senses motion and powers down when it does not in order to extend battery life.
SpectraCoat™
Highly efficient, ultra-wide broadband, anti-reflection lens coatings reduce surface reflections to extremely low levels across the entire visible spectrum providing superior light transmission.LevelPlex
The LevelPlex digital anti-cant system utilizes an integrated digital level with cant indicators located inside of the riflescope. 6 times more accurate than a typical bubble level, LevelPlex allows the shooter to remove unwanted cant from the system to +/- 0.5° of accuracy.Ballistic Data Exchange 2.0
Ballistic Data Exchange is a rangefinder and riflescope system that uses your ballistics, environmental conditions and Bluetooth to illuminate the exact holdover dot. BDX 2.0 is the Software Update that includes a new easy mode for quick BDX setup out of the box, including: BDX kits come paired and bonded. BDX Quickbond™ system gives users the ability to bond two BDX enabled devices without the smartphone app. BDX equipped KILO™ rangefinders preloaded with ballistic groups for centerfire rifles, muzzleloaders and crossbows. 100% compatible with BDX smartphone app to access the advanced BDX features in configuration options.
KinETHIC™ Kinetic Energy Indicator
Allows a hunter to set a threshold in either ft-lbs or fps for the ethical harvest of game animals. BDX will compute distance ranged and indicate when you drop below the user-set threshold for energy or speed of bullet on target.





