Burris FastFire 3 1x Red Dot - FastFire Illuminated 8-MOA Dot - The FastFire 3 is the best selling red dot sight from Burris. It is available with a 3 MOA or 8 MOA dot. Light and tough, the FastFire 3 series puts an unmistakable, bright red dot on your target to give you an immediate speed and accuracy advantage. Can be used as a primary sight or paired on top of an existing sight.