First of all, what does Aimpoint mean? This is a technology which the Swedish Optics Company developed. It was referred to as Aimpoint AB, and it produces equipment for the forces such as police, navy, military and air force. A vital feature of the Aimpoint is the double lens system that aids parallax free vision. This means that when the target distance is more than 50 yards, the point of impact will be equal to the end of the aim. One of the most popular manufactures of Aimpoint is the M2, which is also called M68.
It is used in the military across many countries, but it is different from the M3 Aimpoint. The differences between the two are in their configuration, battery life, technology, price, etc. M2 uses Circuit Efficiency Technology, while the Advanced Circuit Efficiency Technology is used in the M3. The red dot size in the M3 is in two options 2 and 4, while its size 4 in minutes of angle in M2. The M3 battery life is also longer than M2.