When two of your favorite brands come together to collaborate it's always a "must have" no matter what the product is. In this case those two entities are Rocksmith and Diamond Supply Co. and they've come together for the release of two limited edition designs, available in both tees and tank tops. The set includes an Independence Day-themed luxury flag with Diamond's blue signature styling and the branding mashup "Rock Diamond". This collaboration is available exclusively on RocksmithNYC.com and at Diamond's flagship store on Fairfax today. In addition to bringing our NYLON Guys readers this news, our friends at Rocksmith and Diamond have asked us if we'd like to give these shirts away. So in the spirit of the upcoming holiday we're asking readers to instagram or twitpic a picture of "Old Glory" and at @Rocksmith, @Diamond, and @NYLONGuysmag. A winner will be picked and announced Wednesday and then we'll send you the goods!