Juice the limes and the orange in a large measuring cup, then add tequila, grand marnier, and simple syrup. Mix. Wet the rim of the glass with lime juice/wedge and dress it with either Lemon-Lime or Lime Beer Salt. Add ice to the blender and margarita mixture and blend until desired consistency. Pour margarita into salt-rimmed glass, pop open a beer and place upside down into drink. Enjoy!