Aim-O RDG Multi Reticle Open Red Dot 20x33 mm — Black

The RDG Multi Reticle is an open-tube red dot from Aim-O with a 33 mm window and an 80 mm body, designed for shooters who want an unobstructed field of view at close to medium distances without giving up reticle choice. The integrated 21 mm Picatinny/Weaver rail allows direct mounting on rifles and pistols with no additional adapters.

The rear selector lets you choose between four distinct reticles — single dot, circle, circle with dot, and crosshair — each adjustable across 7 brightness levels. This means the shooter can switch from a fine dot for precise aimed fire to a wide circle for rapid target acquisition without removing the optic or changing the setup. The trade-off to be aware of is this: switching in the field is quick, but it requires operating the rear selector, which on some platforms can be harder to reach with certain grips or thick gloves. Shooters who work primarily in a single condition will tend to leave the reticle fixed, while the system proves its value in training or during sessions covering different engagement distances.

The front lens has an anti-reflection coating that reduces parasitic glare in strong backlighting conditions, keeping the reticle contrast visible. At 132 grams and a compact footprint, the RDG does not noticeably affect the balance of the weapon and fits equally well on carbines and more compact platforms. Power comes from a single CR2032 battery, which is easy to source.

Key points

• Four rear-selectable reticles allow the aiming point to be matched to the distance and pace of engagement without changing optics.
• Seven brightness levels keep the reticle visible in both low-light environments and full sunlight.
• The integrated 21 mm Picatinny/Weaver rail removes the need for separate rings or adapters.
• The anti-reflection coating on the front lens reduces backlighting glare and preserves reticle contrast.
• At 132 grams, the weight has no meaningful impact on weapon balance, making it compatible with lightweight platforms as well.

In the box

• Aim-O RDG Multi Reticle red dot
• CR2032 battery