You already love your Beretta CX-4 Storm, and accessorizing it it just too much fun.  I own a 9mm Storm and even before I received the carbine, I had many accessories ready for it's arrival.

I was frustrated that after months of searching I could not locate a dealer who had stock of the highly requested barrel shroud.  Beretta USA does not even carry stock most of the time.  I was finally able to get hold of a Beretta shroud, but it was very heavy and did not seem to "flow" with the rest of the Storm.