I'm most familiar with airsoft long guns that are battery operated. I am dimly aware that airsoft handguns come in two flavors: spring-piston and 'green gas'-powered. All I know about the two is the former are cheap and the latter are... let's say "somewhat fussy".
I've thought that an airsoft clone of my actual CCW gun might be handy for certain uses, but all the airsoft 1911s that I’ve run into are either GI clones for kids that want to play Saving Private Ryan or double-stack STI 2011 knockoffs for kids that want to play IPSC superstar. I’ve yet to find a single-stack airsoft 1911 with a beavertail, extended thumb safety, and three-dot sights at the local gun show. (Of course, all the guns there looked a little chintzy anyway...)