SKU: PAO-GLX-MD-21S-ACSS
UPC: 818500018285
MPN: PA-GLX-MD-21S-ACSS
The Primary Arms GLx MD21S Microdot 21MM Objective Red ACSS CQB Reticle is a compact optical sight engineered for close-quarters battle and tactical carbine applications where speed and target acquisition matter. Built on the proven Aimpoint Micro footprint, this microdot serves operators, law enforcement, and precision shooters who demand reliable performance in CQB scenarios—from force-on-force training to patrol carbine work. The 21mm objective lens balances light transmission and overall profile, making it ideal for riflemen who refuse to compromise on sight picture without adding unnecessary bulk.
The GLx MD21S features Primary Arms' proprietary ACSS CQB reticle—a battle-proven design that integrates bullet drop compensation and rapid target engagement cues optimized for intermediate distances. The red dot illumination provides exceptional contrast in low-light environments, critical when response time is measured in milliseconds. Housed in a hard-anodized aluminum tube with military-grade black finish, the optic resists corrosion and impact while maintaining zero shift integrity under tactical stress. The compact form factor and lightweight design minimize sight height while preserving cheek weld consistency on modern rifle platforms.
Law enforcement and military units benefit most from this sight when transitioning between distances under 300 yards—precisely where the ACSS CQB reticle excels. Direct compatibility with Aimpoint Micro footprint mounts eliminates guesswork; thousands of existing mount solutions work immediately upon installation, from QD risers to integrated receiver tops. Carbine operators in patrol, breacher, and urban sniper roles appreciate the reduced parallax shift and the reticle's ability to remain effective even with less-than-perfect cheek position. The anodized finish ensures reliability in harsh environments, and the microdot's rugged construction withstands the demands of duty and training cycles alike.
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