The Darton Cyclone SD is a specific model of bow produced by Darton Archery. The "SD" in its name stands for "super-duty." This model is known for its durable construction, high performance, and versatility, making it a popular choice among hunters and competitive shooters. The Cyclone SD features a compact design, adjustable stock and forearm, and a high-powered limb system, making it an effective and reliable weapon in the field.