Primary Arms GLx MD-21S Features The Primary Arms GLx MD-21S centers on an Ultra Bright 2 MOA Dot ACSS CQB reticle that can be cycled through 12 brightness settings including night vision compatible settings for full operability in any lighting environment. The solar failsafe system draws ambient light to supplement the CR2032 3V lithium battery so the dot keeps running even as the cell ages or runs low. Autolive technology automatically powers the reticle down after roughly two minutes of inactivity and instantly reactivates it the moment the optic senses movement protecting battery life without asking the shooter to remember a manual switch. Fully multi coated lenses and a fully upgraded emitter work together to deliver a crisp bright dot with minimal glare across a wide range of lighting conditions. Shockproof and waterproof aluminum construction with a hardcoat anodized black finish gives the GLx MD-21S the durability to handle close quarters carbine and pistol caliber platforms without hesitation. It mounts to the Aimpoint Micro and Standard Microdot footprint and ships with a low mount and an absolute cowitness mount with spacer so it drops onto a wide range of existing setups without a separate purchase. Side mounted push button controls keep adjustments fast and intuitive under time pressure and at just 5 oz the optic adds negligible weight to a defensive or competition build. Backed by Primary Arms reputation for field tested reliability the GLx MD-21S is a complete ready to mount micro red dot package. Primary Arms GLx MD-21S Specifications Manufacturer: Primary Arms Model: GLx MD-21S Type: Red Dot Sight Power: 1x Objective: 21mm Reticle: Red ACSS CQB Color: Black Material: Aluminum Finish: Hardcoat Anodized Mount Type: Aimpoint Micro / Standard Microdot Includes: Low Mount and Absolute Cowitness Mount with Spacer Brightness Settings: 12 Settings Battery: CR2032 3V Lithium Optic Coating: Fully Multi Coated Proofs: Shockproof and Waterproof Weight: 5 oz Click Value: 2 MOA Available At: GrabAGun