The lens diameter of the Vortex Viper is much wider than the Fastfire.

The Vortex Viper is not a pioneer model like the Fastfire, however, it still performs well in the market attracting numerous shooters. Quality of the ImageДЇor many years the Burris Fastfire 3 continues to attract users because of the quality of produced images. When it comes to the weight, the Viper Red Dot is a better option than the Fastfire as shooters prefer to work with a model that is lighter in weight. Both models measure 1.9 inches which is great as this means they are both small in size. Mounting the Fastfire onto these rails increases the total weight, however, users should not use the optic without attaching it onto the Picatinny rails. To ensure that users can enjoy a maximum level of applicability, the Burris Fastfire must be placed on to Picatinny rails. According to very many shooters as well as experts, a slight difference even of only 0.1 ounces can greatly influence your performance while on the field. They have a slight weight difference of only 0.4 ounces. Vortex Viper Red Dot, as well as the Fastfire 3, are both lights in weight. This proves that it is better to focus and work with a 6 MOA red dot than a 3 MOA red dot. The 6 MOA dot provides users with a clear and crisp target acquisition function when compared toa 3 MOA dot. 6 MOA optic is more advantageous especially when it comes to all types of tactical applications. Quickly firing at a moving target with a handgun or a pistol is not as easy as it seems. In this case, a smaller dot is preferable. The difference between both MOA is quite large and shooters can easily notice this as soon as they have made use of both optics. Vortex Viper is designed with a 6 MOA while the Burris Fastfire 3 comes with a 3 MOA option. The 3 MOA and 6 MOA вЂ“ How do they compare Size of the Reticle

Red dot sight 3 moa vs 6 moa