Wyhaq tries the Tapp Airsoft Hi-Capa Shell HPA Adapater if it is the best HPA adapter in the market right now... "This HPA adapter from tapp airsoft is a game changer in the world of airsoft. For me this is the best HPA adapter that I have ever used in airsoft games. This has purpose in both casual play as well as speedsoft and speedqb tournaments. The low profile of this adapter is unmatched when compared to the m4 adapters and mp5 adapters that are currently the most popular hpa magazine adapters. I normally am a green gas player, but this conversion is one that I actually like. Most hpa adapters I deal with, but to me this the only one that I actually like. This is the closest thing that exists to a perfect hpa adapter for the hicapa tokyo marui platform."