My 17L is not ported. Where can I get a factory ported one? I know that I can buy a new un-ported one and have it done, but that would not be legal for competition class. Right? I checked with Glock once last year, and they had none. Even a used one would do. Or a complete upper. Any ideas? I am not ready for Unlimited so I need to stay stock. Thanks, Dayton P.S. Anybody want to carpool (from VA) to NJ for the June match. Buddies here can't make it. My wife is not too interested. See Ya.