Aim-O M3 Red/Green Dot Open Reflex Sight with Cantilever Mount — Black

The Aim-O M3 is a compact open-tube reflex sight with selectable red and green dot, designed for use on airsoft platforms with a 20 mm RIS rail. The cantilever mount included in the box allows co-witnessing with the weapon's iron sights without additional adapters, making the system ready to use straight out of the box.

The dot reticle is adjustable for windage and elevation via the side and top turrets, allowing the sight to be zeroed after mounting without any special tools. The 5 brightness levels let you match the dot intensity to ambient light conditions: a low setting reduces blooming in bright environments, while the higher levels keep the dot visible even when shooting into the light or under direct sunlight.

The red/green dot is powered by a single CR2032 battery, which is widely available and inexpensive. The typical trade-off of this open-tube format is less protection for the emitter compared to a closed red dot: the front lens is exposed to the elements and debris, meaning that in heavy rain or dusty conditions you need to pay closer attention to keeping the lens clean to maintain a clear dot. On the other hand, the open structure provides the widest possible field of view, free from the frame that a closed tube imposes on peripheral vision.

Key features

• Compatible with 20 mm RIS rail: direct mounting without adapters on any standard platform.
• Selectable red or green dot to match target contrast and lighting conditions.
• 5 brightness levels to keep the dot visible in both low-light and high-intensity direct light.
• Cantilever mount included: maintains a mount height compatible with iron sights without additional accessories.
• Open-tube design: wider field of view than closed red dots, at the cost of less protection for the front optic.

In the box

• Aim-O M3 Red/Green Dot sight
• Cantilever mount for 20 mm rail
• CR2032 battery