They eyes will probably be set in a recess of the body coming up from the frame kept in place by the breach insert. Slightly akin to a mini or ion p'haps. They would be difficult to access, but there will be no need to access them often with the self cleaning breach...just a guessYou tease!, although i'm not sure how they will do that with the eyes.
I do like the look of it though & has the breach been re done to be reball friendly?