Sig Sauer - SIERRA6BDX 3-18x44mm Riflescope, BDX-R2, SFP

Smart, lightweight precision for any season. The Sig Sauer SIERRA6BDX 3-18x44mm (SFP) packs award-winning SIERRA technology and BDX 2.0 into a compact, ultra-light optic built for centerfire rifles, muzzleloaders, shotguns, and crossbows. Pair it with a BDX-enabled rangefinder to get an automatic, ballistic-specific holdover dot—bringing Applied Ballistics® intelligence straight to the field without a phone.

Key Features

• Integrated BDX® Ballistic Data Xchange 2.0 with up to 95% light transmission
• Advanced HDX® 6x optical system for bright, sharp images across the zoom range
• Automatic holdover dot on a Digital Focal Plane with BDX-R2 reticle
• Ballistic profiles for centerfire, muzzleloader, and crossbow platforms
• LevelPlex™ digital anti-cant with Auto LevelPlex mode for steadier shots
• KinETHIC™ indicator helps confirm ethical energy delivery on target
• IPX-7 waterproof and fog-proof; argon purged for long-term reliability
• Compact, lightweight build designed for ultralight rifle and multi-platform use

Specifications

• Magnification: 3–18x
• Objective Lens Diameter: 44 mm
• Maintube Diameter: 30 mm
• Focal Plane: Digital (BDX holdover on digital focal plane)
• Reticle: BDX-R2; Illumination: Yes (10 daytime settings)
• Total Elevation/Windage Travel: 60 MOA / 60 MOA
• Travel per Rotation: 20 MOA
• Parallax: Adjustable
• Eye Relief: 3.7 in (low) / 3.9 in (high)
• Field of View @100 yd: 34.9 ft (low) / 5.8 ft (high)
• Diopter Adjustment Range: ±2
• Internal Gas Purge: Argon
• Ocular Outer Diameter: 1.61 in
• Weight: 23.8 oz
• Color: Black
• Mount Included: No
• Battery: (2) CR2032
• Waterproof Rating: IPX-7 (immersion to 1 m)

Ideal Uses

• Backcountry and ultralight hunting where size, weight, and fast ballistic holds matter
• General-purpose rifles needing smart holdovers for mid- to long-range precision
• Muzzleloader and crossbow setups leveraging BDX ballistic profiles

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