The Heretic Custom Hydra Single Action OTF Automatic represents the pinnacle of American automatic knife craftsmanship, where mechanical precision meets rare materials and meticulous hand finishing. Designed by master knifemaker Anthony Marfione, the Hydra platform has already earned a reputation for bold engineering and unmistakable design. In this custom configuration, it becomes something far rarer—an extraordinary collector’s piece built with artistry, premium materials, and uncompromising attention to detail.
The 3.625” drop point blade is hand ground from premium M390 stainless steel and brought to a brilliant high-polished finish. M390 is widely regarded as one of the finest modern blade steels available, delivering exceptional edge retention, outstanding corrosion resistance, and remarkable durability. The hand-ground geometry highlights the craftsmanship behind the blade while enhancing cutting performance and balance. Genuine abalone inlays set into the blade create a stunning contrast against the mirror-like polish, producing shifting colors and iridescent depth that make every angle of the knife visually captivating.
The Hydra’s powerful single-action out-the-front mechanism is driven by its distinctive charging handle system. The aluminum charging handle arms the internal spring, allowing the blade to deploy forward with rapid authority when the firing button is pressed. Once deployed, the blade locks firmly into place, delivering the solid feel and reliability expected from a premium automatic platform.
A defining innovation of the Hydra is its pioneering button safety system. The textured firing button is protected by a sculpted swivel cover that rotates over the button when engaged, preventing accidental activation while adding a dramatic mechanical element to the design. This thoughtful safety feature blends seamlessly into the knife’s architecture while reinforcing the Hydra’s reputation for forward-thinking engineering.
The chassis is constructed from stainless steel, giving the knife a substantial, refined feel in hand. Genuine abalone inlays accent the button cover, firing button, charging handle, and decorative plate, creating a unified design that elevates the knife from high-end tool to functional artwork. The luminous natural colors of the abalone shift under light, providing a striking contrast against the polished steel framework.
Measuring 5.3” closed and weighing 5.2 ounces, the Hydra carries with a solid, confident presence while maintaining the precision and mechanical refinement that collectors expect from a custom Marfione design. Each knife includes a custom metal certificate of authenticity and a premium zippered nylon storage case. Proudly made in the USA, it stands as a testament to the craftsmanship and innovation behind Heretic Knives.
Smoky Mountain Knife Works, the world’s best online knife store, is also a true Tennessee landmark and the world’s largest knife store. Located in the heart of the Great Smoky Mountains, more than 1.5 million visitors pass through SMKW’s legendary showroom every year to experience one of the most remarkable knife destinations anywhere.
