The Primary Arms GLx MD-21S (model 810026) is a high-performance micro dot optic built for superior agility and precision from close quarters to intermediate range, fitted here with the ACSS CQB reticle and an advanced solar failsafe system to supplement its power supply.

Key Specifications

• Manufacturer: Primary Arms
• Model: GLx
• Product Type: Red dot sight
• Magnification: 1x
• Reticle: ACSS CQB
• Power Backup: Solar failsafe system
• Reticle Color: Red
• Application: Close-quarters to intermediate range
• Body Style: Micro dot-sized

Frequently Asked Questions

How does this differ from the SLx MD-21S ACSS CQB model? Both share the same ACSS CQB reticle, but this GLx version adds a solar failsafe power system to supplement the battery, a feature not included on the SLx tier.

What kind of engagements is the ACSS CQB reticle built for? It’s designed around close-quarters ranging and holdover references for fast target engagement at short-to-intermediate distances.

Buy the Primary Arms GLx MD-21S ACSS CQB Red Dot Sight

Shop the Primary Arms lineup or browse more of our Red Dot Sights selection at Schaefer Defense.