It's a 2 MOA dot.
I have one and very much regret buying it. I thought “oh let me get the Ronin version so I can have the dragon.” I wanted one gun that wasn’t all black so i enhanced one with the best of the after market parts. well the dragon is barely noticeable that picture makes the dragon stand out more than it does in person. It’s a small window optic which if that’s what you want the EPS carry would be a much better option. The Robin has no solar charging so if the battery is dead it’s worthless where the EPS carry will alway recharge your battery. Secondly, Optic Guard is coming out with some nice options from carbon fiber to different color camo optic protectors. If you put an optic protector on the Ronin then that defeats the purpose of getting the flashy model. But to answer your question it’s a 2moa. The enclosed emitter is very nice. So much easy to clean the glass than open model. I’d send a pic of it on my gun but it won’t let me upload files.