Is it just 6 BBs in a revolving chamber or is the revolver part just aesthetic? Most Airsoft guns I've seen hold dozens of BBs so 6 seems like not a lot.
Depends on the replica. I have a revolver that takes "shells" with a bb on the end of it. It's sadly too powerful to be used as a sidearm, and as you said 6bbs is not too many. So you can have one that works kinda like a revolver, but any dude with a gas glock will outgun you.