High-Zoom Large-Objective Rifle Scopes | 3-21x Illuminated, 50mm Objective, 30mm Tube, MIL Adjustment BEM3-21X501 SFIR
The BEM3-21X50 SFIR Rifle Scopes are high-magnification 3-21X variable rifle scopes designed for long-range hunting, precision shooting, varmint control, and advanced sporting rifle applications. Featuring a large 50mm objective lens, illuminated special reticle, MIL adjustment system, broadband multi-coated optics, durable one-piece tube construction, and high magnification capability, this scope provides a professional solution for shooters seeking maximum versatility and precision.
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With its extended zoom range and precision-oriented configuration, the BEM3-21X50 SFIR is suitable for hunting brands, long-range optic distributors, sporting rifle suppliers, and companies developing private label Rifle Scopes product lines.
OVERVIEW
Key Advantages and Product Features
Ultra-Wide 3-21X Magnification Range
The 3-21X magnification range provides exceptional versatility from field hunting to long-range precision shooting.
The lower magnification supports target searching and fast observation, while the higher magnification allows detailed target analysis and precise aiming at extended distances.
Large 50mm Objective Lens
The 50mm objective lens improves light collection capability and supports a brighter sight picture.
This makes the scope suitable for hunting and shooting environments where lighting conditions may change throughout the day.
High Magnification Precision Capability
The 21X maximum magnification provides enhanced target observation for long-distance shooting.
It is especially suitable for applications requiring detailed target identification and precise shot placement.
Illuminated Special Reticle
The illuminated reticle improves visibility in low-light environments.
The customizable reticle platform allows adaptation for different hunting, precision shooting, and market requirements.
MIL Precision Adjustment System
The ±15MIL elevation and windage adjustment range with 1/10MIL click value provides accurate correction capability.
This supports shooters who rely on ballistic calculations and precision shooting methods.
Durable One-Piece Tube Construction
The 30mm one-piece tube design provides strong structural stability and durability.
Combined with shock-resistant construction and nitrogen-filled fogproof protection, the scope is designed for demanding outdoor environments.
High Transmission Optical System
The broadband multi-coated optical system improves brightness and image clarity.
The high single-surface transmission performance helps provide a clearer sight picture during changing light conditions.
Application Scenarios:
Long-Range Hunting Applications
The BEM3-21X50 SFIR Rifle Scopes are designed for hunters who require extended magnification for open terrain, mountain hunting, and long-distance shooting.
The 3X setting provides enough field awareness for searching and tracking targets, while the 21X magnification allows hunters to observe target details and improve shot placement at extended distances.
The illuminated reticle helps maintain aiming visibility during dawn, dusk, and changing outdoor lighting conditions.
Varmint and Predator Hunting
The extremely wide magnification range makes this optic suitable for varmint and predator hunting applications where shooters need both flexibility and high-detail target observation.
The 21X maximum magnification provides additional capability for smaller targets at longer distances, while the lower magnification maintains practical field usability.
Suitable applications include:
- Predator hunting
- Long-range varmint control
- Small target shooting
- Open-field pest management
Precision Shooting and Range Applications
The BEM3-21X50 SFIR provides advanced magnification capability for precision shooting and range applications.
The MIL-based adjustment system allows shooters to make accurate corrections during zeroing, ballistic adjustment, and shooting practice.
The high magnification capability makes it suitable for shooters who require detailed target observation and precise aiming.
Sporting Rifle Applications
The durable construction and wide magnification range make this scope suitable for advanced sporting rifle applications.
It provides a solution for shooters who need one optic capable of handling both general field shooting and longer-distance precision scenarios.
Customizable for Your Brand

Logo and firmware customization available

OEM/ODM support with low MOQ

Custom language interface and startup screens
Customizable Features
- Reticle Design Supports customized hunting, BDC, MIL, and tactical reticle solutions
- Logo Branding Enables private label Rifle Scopes programs
- Lens Coating Options Allows customized optical performance positioning
- Turret Configuration Supports MIL/MOA adjustment preferences
- Illumination System Supports customized illuminated reticle solutions
- Housing Finish Provides brand appearance differentiation
- Packaging Design Customized retail packaging and accessories
- OEM/ODM Development Suitable for customized long-range rifle scope projects
Parameters
| Product Code | BEM3-21X501 SFIR |
| Magnification | 3X-21X |
| Weight (g) | 800g |
| Length (mm) | 345mm |
| Objective Lens Diameter | 50mm |
| Eye Relief (mm) | 89-100mm |
| Tube Diameter | 30mm |
| Illumination | Electronic Lighting: Red light |
| Field of View @100yds | 3X:5.2° / 21X:1.1° @100yds |
| Reticle | Special Reticle |
| Lens Coating | Broadband Multi-coated (Green Film) |
| Side Parallax | N/A |
| Elevation Adj. Range | ±15MIL, 1 Click 1/10MIL |
| Windage Adj. Range | ±15MIL, 1 Click 1/10MIL |
| Locking Method | N/A |
| Shock-Proof | Yes |
| One-Piece Tube | Yes |
| Adjustable Diopter | Yes |
| Nitrogen Filled / Fog Proof | Yes |
| Light Transmission | 90% |
| Single Surface Transmission | 99.5% |
| Diopter Adjustment | ±2D |
For B2B buyers, customization options include reticle design, logo branding, optical coating, turret configuration, illumination solutions, packaging, accessories, and OEM/ODM development.
Contact us to discuss your customized Rifle Scopes solution for long-range hunting, precision shooting, sporting rifles, or private label optic markets.



















