McCoy’s Amphibious Assault is built around a dense, high-buoyancy foam body that ensures the fly remains perfectly balanced on the water’s surface. Its slightly tapered profile allows for subtle movement without excessive splashing, while the broad head helps maintain stability during short pulls and fast strips. Soft, flexible rubber legs extend beyond the rear of the body and are positioned to create lifelike pulsation in response to even minimal water currents or line tension. The recessed hook is fully embedded within the foam, preserving the fly’s natural silhouette and reducing hang-ups. Overall, this design creates a surface fly capable of consistent, realistic action in a wide range of freshwater and slightly brackish conditions.