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Primary Arms® SLx® MD-21 1x20mm 2 MOA Red Dot Closed Mini Reflex Sight

$259.99

The SLx MD-21 is an advanced micro dot sight that incorporates the latest technologies and materials to deliver exceptional CQB performance. Weighing only 5 ounces, the SLx MD-21 is both lightweight and rugged, featuring upgraded mounting hardware for guaranteed rigidity and precision when you need it most. If you are looking for a taller mount, check out the SLx 2.26″ mount for use with night vision or if you prefer a more headsup shooting position.

The powerful LED emitter features 12 total illumination settings and 2 night vision settings with an ultra-long runtime for full operability in any environment. Additionally, the AutoLive® technology shuts off the reticle when no motion is detected for two minutes and immediately turns on as soon as you pick it up.

Features:

  • Autolive®
    • Our motion-sense technology, AutoLive®, greatly extends your battery life when storing optics with active illumination.
  • Low Battery Inducatory
  • Fully Multicoated Anti-Reflective Lens
    • Our Multicoated Lenses are treated with a special finish to reduce reflections and increase light transmission.
  • Ambidextrous Top-mounted Push Buttons Controls
    • With Push Button Controls, you can easily adjust your optic’s power and illumination settings in seconds.
  • Low-profile Recessed Turrets
  • Red Dot Bright®
    • This feature is reserved for scopes with the brightest reticle illumination, comparable to the highest settings on a red dot sight.
  • Night Vision Compatible
  • High/Low Setting Indicator
  • Uses 3v CR 2032 Battery
  • Durable Cast Housing
  • Fits Standard Micro Dot Mounts
    • Comes with 1.41″ and 1.535″ height co-witness mounts
  •  Shockproof
    • Our Shockproof optics are reinforced against impact, capable of facing the rigors of duty use.
  •  IP67 Rated Waterproof
    • Our Waterproof optics are sealed for reliable function, even when fully submerged in water.
  • Fog Resistant
  • 2 MOA Red Dot

Specs:

Image Clarity:

Reticle Type Second Focal Plane Reticle 2 MOA Dot
Illuminated Red Illumination Settings 12
Light Management System SLx Glass Type Standard
Lens Coatings Fully Multicoated, Anti-Reflective Light Transmission (%) Standard
Perceivable Lens Tint Faint Blue Eye Relief Low Mag (in; mm) Unlimited
Eye Relief High Mag (in; mm) Unlimited Exit Pupil Low Mag (in; mm) ~0.8; 20 (Calculated)
Exit Pupil High Mag (in; mm) ~0.8; 20 (Calculated) Twilight Factor Low Mag ~4.5
Twilight Factor High Mag ~4.5 Diopter Type None
Parallax Adjustment None Parallax Free Distance (yd) Standard

Image Adjustment:

Min Magnification 1x Max Magnification 1x
Objective Lens Diameter (mm) 20 Low Mag Field of View (ft @ 100 yds) Standard
High Mag Field of View (ft @ 100 yds) Standard Observable Tunneling Effect N/A
Elevation Turret Style Recessed Elevation Adjustment Range (MOA) 100
Elevation Dial Travel Limit (MOA) Max Adjustment Range Elevation Adjustment Value per Click (MOA) 0.5
Elevation Clicks per Rotation 80 Windage Turret Style Recessed
Windage Adjustment Range (MOA) 100 Windage Dial Travel Limit Max Adjustment Range
Windage Adjustment Value per Click (MOA) 0.5 Windage Clicks per Rotation 80

Utility:

Locking Dial No Zero Stop No
Indexable Turret No Indexing Type N/A
External Rotation Indicator No Illumination Control Top Mounted Textured Buttons
Locking Illumination No Auto-Shutoff (hrs) Standard
Throw Lever N/A HUD Elements Low Battery Indicator
Nightvision Compatible Illumination 3 Levels Motion Sensor Capabilities Autolive Reticle Illumination Activation
Electronic Reticle Leveler No Sunshade/ARD Compatible Yes (Sold Separately)

Physical:

Form Factor Mini Closed Reflex Sight Tube Diameter/Mount Type Pre-Installed MIL-STD 1913 (Picatinny) Canitilever Mount  ; Supplied Picatinny Low Mount;  Aimpoint T1 Spec
Mount Height (in; mm) 1.41; 35.814 (Pre-Installed), ~0.83; 21 (Low), 0.125; 3.175 Spacer Finish Hard Coat Anodized Black
Water Resistance IP67 Waterproof Fogproof Fog Resistant
Shockproof Duty Rated Min Operating Temperature (°F; °C) Standard Conditions
Max Operating Temperature (°F; °C) Standard Conditions Battery Type (1) CR2032
Battery Life (hrs) Standard Optic Weight (oz; g) 5.0; 141.748
Optic Length (in; cm) 2.8; 7.112 Default Front Mounting Length (Slots) 8
Default Rear Mounting Length (Slots) 8 Default Total Mount Length (Slots) 8
Objective Housing Length (in; cm) ~0.4; 1.0 Objective Housing Width (in; cm) ~1.2; 3.1
Objective Housing Height (in; cm) ~1.2; 3.1 Eyepiece Housing Length (in; cm) ~0.1; 0.2
Eyepiece Housing Width (in; cm) ~1.2; 3.0 Eyepiece Housing Height (in; cm) ~1.2; 3.0
Magnification Ring Outside Diameter (in; cm) N/A Turret Saddle Depth (in; cm) N/A

Additional Information:

Manufacturer SKU PA-SLX-MD-21
Manufacturer Part Number 810027

Disclaimer:

Manufacturers, importers, suppliers, and distributors may make changes to their products without fanfare. Such changes can lead to discrepancies between the advertised product and the actual product in inventory. While International Shooting Supplies Ltd. endeavors to correctly describe the actual product in inventory, we will not be responsible for unintentional inaccuracies in text and images of the advertised product.

Weight 0.8 kg
Dimensions 17.5 × 14 × 8.5 cm
Manufacturer

Primary Arms Optics

Tube Diameter

25mm

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