Attention Young People
1. Back when the primary medium for music was the long-playing record (AKA "the LP"), we called them "records" or "albums." We knew they were made of vinyl, but no one said "Let's go buy some vinyl" or "Let's listen to some vinyl."
2. If you want to refer to records as "vinyl" in 2015, feel free; I have grown accustomed to it and, when I hear it, I no longer feel the urge to kill. But please avoid saying "Let's go buy some vinyls." It's just bad grammar. And it might make me snap.