Shop American Muscle Grill Side Burners AMGPB in Propane and Natural Gas for your American Muscle Grill Outdoor Kitchen at The Outdoor Store. American Muscle Grills feature complete #304 steel construction and innovative designs for maximum airflow. The American Muscle Grill Side Burners are designed for precision and speed, and it delivers with style and power. The American Muscle Grill not only allows for multiple fuel types, it excels in performance over its single fuel competitors. Every whole is only as good as its parts, so each American Muscle Grill is proudly designed, built, and factory tested in the USA. With excellent customer support and warranty from fellow grilling enthusiasts, each component and accessory is designed and constructed to the highest standards.