two MOA only : This dot is kind of tiny that makes it exact. The draw back is the fact it might be difficult to “get” upon drawing the weapon. If you're knowledgeable capturing red dot sights on pistols then this will not be a difficulty in your case. https://fernandoezpzj.suomiblog.com/5-tips-about-fn510-accessories-you-can-use-today-50024908