SIG SAUER SIERRA4-BDX 6-24x50mm Waterproof Hunting Precision Shooting Riflescope with BDX…
- Rifle Scope
- 50 mm
- 6x
- 24x
A BDX-connected scope that shifts holdover calculation to the electronics, best suited to hunters building out Sig's rangefinder-to-scope ecosystem.
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How it ranks among the 359 rifle scopes we track
0 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 359 rifle scopes we track - how the scorecard works · full rifle scopes data report. Confidence: limited - limited rating history.Last refreshed Jun 22, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Sig Sauer Sierra4-BDX 6-24x50mm pairs a 6-24x zoom range with BDX Ballistic Data Xchange, syncing over Bluetooth with compatible rangefinders to project a holdover dot sized to the actual target distance.
The BDX-R2 digital reticle uses 194 individually controlled LEDs to place that holdover dot, driven by range data streamed from a paired BDX rangefinder within about 30 yards. SmartBDC lets a shooter pick from 9 onboard ballistic groups or build a custom profile instead. The housing carries Sig's Stealth ID coating to reduce visual signature and an IPX7 rating on a 30mm main tube.
- BDX Ballistic Data Xchange
- 194-LED BDX-R2 digital reticle
- Bluetooth pairing to 30 yards
- IPX7 waterproof 30mm tube
Who it's for
Hunters who already own or plan to pair a BDX-compatible rangefinder and want the scope to calculate holdover automatically instead of doing mental math at the range.
Strengths and trade-offs
Drawn from this product's published specifications.
- Automated holdover dot via BDX pairing
- 9 onboard ballistic groups plus custom profiles
- IPX7 waterproof 30mm tube
- SpectraCoat and LensArmor lens coatings
- Holdover feature needs a separate BDX rangefinder
- No rating or review data available yet
Performance notes
The BDX-R2 reticle uses 194 individually controlled LEDs to place an illuminated holdover dot that shifts with range data streamed over Bluetooth from a paired BDX rangefinder, with a stated pairing range up to 30 yards between the two devices. Shooters can pick from 9 onboard ballistic groups or build a custom profile through SmartBDC. The housing carries an IPX7 waterproof rating on a 30mm main tube, with SpectraCoat anti-reflection and LensArmor abrasion-resistant lens coatings.
Specifications
| Brand | Sig Sauer |
|---|---|
| Model | SOSBDX46111-SIG |
| Dimensions & fit | |
| Objective Lens Diameter | 50 mm |
| Item Weight | 9.6 ounces |
| Construction & materials | |
| Material Type | See Description |
| Color | Black |
| Compatibility & installation | |
| Compatible Devices | Rifle, Rangefinder (BDX-equipped) |
| Included components | |
| Included Components | See Description |
| Other details | |
| Magnification Minimum | 6x |
| Magnification Maximum | 24x |
| Sport Type | Hunting & Shooting |
| Reticle Type | BDC |
| Night vision | No |
| Product Style | Tactical |
Other Sig Sauer rifle scopes
How it compares
This product against the closest alternatives we track in rifle scopes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| SIG SAUER SIERRA4-BDX 6-24x50mm Waterproof Hunting Precision Shooting Riflescope with BDX…This product | - | - | 2.7 / 5 |
| UTG 3-12X44 30mm Compact ScopeUTG | 4.5 / 5 | 3,000 | 4.4 / 5 |
| Vortex Optics Diamondback Second Focal PlaneBrand | 4.7 / 5 | 1,500 | 4.3 / 5 |
| PINTY Tactical Rifle Scope Combo: Illuminated OpticsPinty | 4.4 / 5 | 1,100 | 4.3 / 5 |
| Firefield RapidStrike 1-6x24 SFP Riflescope KitFirefield | 4.5 / 5 | 900 | 4.3 / 5 |
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Questions about the Sig Sauer SOSBDX46111-SIG
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Sierra4-BDX need a separate rangefinder to work?
The illuminated BDX-R2 holdover dot requires pairing with a compatible BDX rangefinder over Bluetooth.
What is the pairing range between the scope and rangefinder?
Sig states the Bluetooth connection holds up to 30 yards.
What main tube size does the Sierra4-BDX 6-24x50mm use?
A 30mm main tube, with an IPX7 waterproof rating.