Home / Red Dot Sights / Primary Arms / Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black
Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black
Lowest Listed Price
MSRP
$209.99
Savings
31% off
Retailers Reporting In Stock
11 Stores
Updated
Sep 8, 2026
Compare Deals from 14 Retailers
Sorted by lowest price
Page 1 of 2
AutoLive Technology Extends Battery Life
Fully Multicoated Lens
Includes Low Mount and Absolute Cowitness Mount
Night Vision Compatibility
Shockproof and Waterproof Aluminum Construction
Top Mounted Push Button Controls
Specifications
Description
The Primary Arms SLx MD-21S is an advanced micro dot sight that incorporates the latest technologies and materials to deliver exceptional performance. Weighing only 5 ounces, the SLx MD-21 is both lightweight and rugged, featuring the newest Primary Arms mounting hardware for guaranteed rigidity and precision when you need it most. The upgraded LED emitter offers complete night vision compatibility as well as a true Daylight Bright reticle with an ultra-long runtime for full operability in any environment.FeaturesAutolive Technology to Help Save Battery LifePush-Button Controls12 Illumination SettingsThe CQB Version Reticle has 4 Selectable Reticles
