Collimator Primary Arms GLx MD-21S 21mm Micro Dot AutoLive 2 MOA Red Dot

Primary Arms GLx MD-21S Micro Dot 21 mm with a 2 MOA red dot is a reflex sight designed for shooters who demand instant response, uncompromising durability, and cutting-edge optical performance. The combination of AutoLive® technology and an intelligent solar panel makes every shot deliberate — precise, fast, and confident.

Primary Arms GLx MD-21S — Key Features

• AutoLive® Technology — automatically turns on when motion is detected.
• Top Solar Panel — provides backup power and enhances energy efficiency.
• Low Battery Indicator — keeps you informed about power status.
• 2 MOA Red Dot — allows fast and accurate target acquisition.
• Compact Micro Dot Design — fits standard Micro mounts.
• Aluminum Anodized Housing — resistant to shock, corrosion, and weather.
• IP67 Protection Rating — waterproof, dustproof, and fog-resistant.
• Low-profile turrets with position indicators.
• Night Vision Compatible — ready for nighttime operations.
• Left-side button controls — intuitive and fast adjustment.
• Power supply: CR2032 battery (included) — long runtime.
• Lifetime Warranty — guaranteed reliability for years.

AutoLive® — a sight that thinks for you

Thanks to the automatic activation upon motion detection, the sight is ready exactly when you need it. When not in use, it enters sleep mode, conserving battery power without any manual input.

Reliability in all conditions — IP67 and Solar Panel

The GLx MD-21S is built to perform in extreme environments. Its IP67 waterproof rating ensures resistance to rain, dust, and mud. The solar panel on top supports operation when the CR2032 battery runs low — with a built-in low-battery indicator keeping you informed.

Primary Arms GLx MD-21S — superior image quality and bright red dot

The 2 MOA red dot enables lightning-fast target acquisition at short ranges. The multi-coated anti-reflective lens delivers a bright, crisp image full of detail, while night-vision compatibility expands the user’s tactical capabilities.

Primary Arms GLx MD-21S — one sight, total control

The Primary Arms GLx MD-21S is a professional-grade optic built for shooters who value precision, durability, and versatility. Whether at the range, in the field, or in tactical use — this sight is one you can rely on.