2 MOA only : This dot is quite little that makes it precise. The downside is the fact that it may be tough to “pick up” on drawing the weapon. If you're knowledgeable shooting purple dot sights on pistols then this might not be a difficulty in your case. https://fn510accessories64023.mysticwiki.com/1348947/5_tips_about_fn510_accessories_you_can_use_today