I still have my version 1, version 2 and version 3 metal AI adaptors. All still fully functional and all ordered within a week of MadMax releasing them. No issues with filling or leaks from them.
Saskatchewan Age Verifier! Contact for more Info.
http://airsoftcanada.com/showthread.php?t=174161 - Honour & Respect your fellow players! #Airsofthonourandrespect