Yes I am talking about the Armored parts.
It could be a port to allow the 25mm gun to be used with the Armored pack. But I guess that depends on the artist. In the Chronicle's Tech sheet on the Full Armor (issue #21), there's a picture from a different artist that drew the model lineart. In the Chronicle's picture, those ports on the hips for the 22mm guns that Mr. March pointed out appear to be barrels of some sort, which has be believing that those are the 22mm beam guns. In the Chronicle as well, that artist drew that other port on the hip only slightly bigger so it could be a port to allow the 25mm guns.
I am fairly convinced that the chest ports aren't beam guns at this point. Verniers or vents are a good possibility.