Place shrimp onto metal skewers and lie flat on a cutting board. One pound made 3 full skewers for me.
Using a pastry brush, brush one side of the shrimp with the sriracha sauce using only half of the sauce, then sprinkle with of the spices and a bit of salt and pepper. Then flip the shrimp over and repeat until well coated.
Place shrimp on top rack of the grill and cook for 3-4 minutes per side or until cooked through.
While shrimp are cooking, in a large bowl mix together ingredients for easy guacamole.