The holosun eps carry is a perfect fit on the sig p365 x-macro. I ordered the 6 moa dot in red and it is just the right size. I like that I don't have to increase the dot intensity to a distorted level to see it. I was worried that the dot would be too big but it is not much different than my 3.5 moa aimpoint. I know someone with a 2 moa holosun in green and it was too small unless I increased the brightness. That made the dot look distorted. The sight itself is very sleek looking and well made. There are youtube videos about the dot size that I recommend you search out and watch before ordering so that you get what is best for you. Also, Dawson Precision has some fiber optic sights that are made to co-witness on the sig with this eps sight. Overall I am very pleased with the Holosun EPS Carry 6 moa red dot. The price and the customer service is the best at Freedom Gorilla.