There are a couple of SAM missiles that I have seen around ship bucket that are not in any part sheets. And one of them looks like a small SM-3. I also heard of a SM-6.
Going by (slightly enlarged as with all SB missiles) scale and by appearance, this is the SM-6:
Are GAU-17 7.62mm mini guns on the list for this sheet, ora gun CIWS one?
No, it is not. It's barely distinguishable from the 12.7mm, but slightly different. The 12.7mm is on the left, the M134 on the right.