Hey all. I'm looking for an airsoft Glock 19 to use indoors as a trainer, so I'd like it to be as close as possible to the real thing. Ideally it would have both a metal slide and blowback that mimics recoil. Any other advice on what to get and what not to get would also be very helpful. (Assume I know nothing about the airsoft world, which is pretty much the case.) Thank you!