Primary Arms GLx MD-21S 21mm 2 MOA Red Dot Sight

The Primary Arms GLx MD-21S is a 21mm micro red dot built for close quarters out to intermediate distance. The 2 MOA dot is small enough for precise shots and bright enough for daylight. A solar failsafe supplements the CR2032 battery, and AutoLive turns the dot off after two minutes without movement, then back on as soon as the gun is picked up.

Side push buttons cycle 12 brightness settings, including night vision compatible levels, and the lenses are fully multi coated. The aluminum housing is shockproof, waterproof and hardcoat anodized. It uses the standard micro dot footprint, so Aimpoint Micro pattern mounts fit, and it comes with a low mount plus an absolute co-witness mount with a spacer for a 1.41" or 1.535" height. Clicks are 1/2 MOA, weight is 5 oz, and Primary Arms backs it with a lifetime warranty.