[@Frengo] The twin Pistols are easily carried in the side holsters on his Kama. Surprisingly the Z-6 tends to be a somewhat lighter weapon than it appears, and I've seen many clones carry them on their backs. I even recall one instance in SW TCW Republic Heroes (Game) where your character would somehow attach it to the top of their belt and lug it around on their back like it was nothing. The same with the Westar-M5, which has an attachable strap that he can use to just sling it over his arm. And, more often than not, he's going to be using at least one of those weapons.

The Holoprojector is essentially that. It can display different types of holograms, from live communications to holomaps and more. And yes, clones do come with standard communicators, most commonly wrist communicators. Those can only transmit voice, however. For instance, say a BX-Series Commando Droid were to kill one of the team members and try to impersonate his voice (Yes they can do that). If it was a holocommunicator, it would be much harder to fake.

Flash has standard comm gear, but his advanced training has taught him to always come prepared.