Chill the rocks glass. Prepare a wedge of Lime (1) for garnish.
Brush the lime wedge across half of the rim of the rocks glass before patting gently into a tray of Kosher Salt (to taste).
Combine Patrón Silver Tequila (1.5 fluid ounce), Patrón Citrónge Orange (1 fluid ounce), Lime Juice (0.75 fluid ounce), and Simple Syrup (2.5 fluid ounce) into a cocktail shaker.
Add ice to the shaker and the rocks glass, then shake to combine and chill.
Strain into the rocks glass and garnish with a lime wedge.