Alpha Optics AO-1251/1351 MG NV Monocular

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Alpha Optics AO-1251/1351 MG Multipurpose Night Vision Monocular

Key Features:

- Compact, rugged design

- Head or helmet mountable for hands-free usage

- Weapon mountable

- Waterproof

- Built-in IR illuminator

- Bright light cutoff

- IR ON indicator, Low battery indicator

- Ergonomic, simple, easy to operate control

- Adaptable for use with cameras

- Manual gain control

- Nitrogen purged

Standard Accessories: 

Lens Cover, Eye Cup, Battery, Battery Adaptor, Demist Shield, Sacrificial Window, Lens Tissue, Soft Carrying Case

Optional Accessories:

Head and Helmet Mounts; Adaptors for Different Types of Headgear; Weapon Mounts; Advanced Integrated Weapon Mount (allows to use monocular as a standalone weapon sight); 3x, 5x Lenses; Long Range Detachable Illuminator; Cleaning Kit; Hard Waterproof Case

PDF icon Download Spec Sheet (637.95 KB)
Image Intensifier TubeGen 2+ or Gen 3
Magnification1x standard; 3x, 5x – optional
Field of View51°
Lens System19 mm; F/1.26
Focus Range0.25 m to infinity
Eye Relief25 mm
Manual Gain Control YES
Diopter Adjustment Rangefrom -6 to +2
Infrared Illuminator with Flood LensBuild-in
Control DirectYES
LED IndicatorsYES (in FOV)
Battery TypeOne 1.5 V AA battery or CR123
Battery LifeUp to 40 hours at 20°C
Operating Temperature-40°C to +50°C
Environmental RatingIP67
Impact-ResistantYES; drop-test 1m
Dimensions109 x 48 x 73 mm
Weight w/o battery310 g


The Alpha Optics AO-1251/1351 is a multi-purpose night vision monocular with manual gain. It can be handheld, head mounted, helmet mounted, or weapon mounted allowing hands-free operations. Build-in IR illuminator and flood lens improve vision in complete darkness. With a wide 51-degree field of view, this device offers enhanced situational awareness without moving the optic. The AO-1251/1351 uses advanced multi-coated optics and is built to last with a compact composite housing.


Perfect Balance of Size and Performance. Built with a tough, ergonomic composite housing. Needing only a single AA battery or one CR123 battery for convenient operation, can run up to 40 hours.


Packed with Features for a Versatile and Customizable Viewing Experience