G&P mags or not?

[Noenine]

Hi, I bought a high cap G&P mag and a mid cap G&P mag from LWA Airsoft. The thing is I'm not sure if they are really G&P mags! The mid cap came in a clear plastic bag and has 'Adventure line mfg.co.inc' stamped on the base of the mag. The high cap has no markings at all on it.
Can anyone tell me if they think they are G&P mags or not? I wanted G&P because I heard they were really good reliable mags.
Thanks for the help!!