I have no specific experience with that particular model but I do use a few of their other products including one of their x3 flip up magnifiers and a 510C GR I think is the model number ... I'll have to check but anyways, Holosun (although it is Chinese made) is a great value for your dollar.
I've all but given-up on EOTech. The Romeos and the Leupolds also have some fine options. I like the Leupold on my M17.
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