Shrimp get a marinade of cayenne and lemon for a spicy-citrus touch. The succulent seafood pairs nicely with smooth avocado.
Soak 8 wooden skewers in water for 30 minutes.
Heat grill to medium-high. Toss shrimp with lemon juice and oil. Season with salt and cayenne pepper.
Thread 1 shrimp and 1 avocado wedge onto each skewer. Grill, flipping, until shrimp are cooked through and grill marks appear, 2 to 3 minutes per side.