Frank Butler was an American inventor and entrepreneur, best known for his contributions to the field of firearms. He is particularly recognized for developing the Butler shotgun, which gained popularity for its innovative design and reliability. His work in the late 19th and early 20th centuries helped shape the modern shotgun industry. In addition to his work with firearms, Butler was also involved in various business ventures. He founded the Butler Manufacturing Company, which produced a range of products, including sporting goods. His legacy continues to influence the design and manufacturing of firearms today.