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. 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.
Law enforcement and military units benefit most from this sight when transitioning between distances under 300 yards—precisely where the ACSS CQB reticle excels. The compact form factor and lightweight design minimize sight height while preserving cheek weld consistency on modern rifle platforms. Direct compatibility with Aimpoint Micro footprint mounts eliminates guesswork for users looking to enhance their tactical setups.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
Primary Arms
