I loved that Airsoft episode, but there's a few things I think I could add.
First off, most airsoft guns are made in China. They don't care about copyright laws there, so most guns are, externally anyway, exact duplicates of real guns, even down to serial numbers in some cases. When buying guns online, realize that the "stores" selling them markup the guns different amounts, and they all have to be imported. So when one dealer is out of a gun, most other dealers will be too. Also real accessories, like lights and bipods, will fit on these guns. As far as ammo capacity goes, "small cap" mags can be purchased. These really enhance the realism of the guns because it limits your ammo to 30 rounds per mag instead of the unreal 300+ rounds in the "high caps".
I recommend playing airsoft with others sometime too. It provides invaluable experience. You learn people's reactions to confrontations, tactics, proper safety, communication skills, the list goes on and on. If anyone has more questions I'd be happy to answer them to the best of my knowledge.
