Heretic Hydra V4 OTF Automatic Knife Two-Tone Magnacut/Tactical Black H407-10A-T

The Heretic Knives Hydra V4 doesn’t play games—it’s a purpose-built out-the-front automatic made for serious use. At the heart of this single-action beast is a 3.625" CPM MagnaCut blade, dressed in a striking two-tone finish with black-coated flats and satin grinds. It’s a look that means business, backed by a steel that offers elite edge retention, excellent toughness, and the kind of corrosion resistance that doesn’t back down in rough environments.

The Hydra V4 fires with serious authority using Heretic’s signature front-lever deployment. The oversized firing button is protected by a rotating safety collar, giving you control when you need it and preventing accidental engagement when you don’t. To retract the blade, a hidden manual release tucked under the button ensures a clean, secure close without compromise. It’s a simple, intuitive system—built like a machine but easy to run even under pressure.

The handle is black anodized aircraft-grade aluminum, milled with precision and fitted with aggressive jimping along the spine for a no-slip grip. Paired with a black DLC-coated titanium pocket clip and a hardened steel glass breaker at the rear, this knife is a complete tactical package ready for daily carry or duty use. Built in the USA with pride and tight tolerances, the Hydra V4 doesn’t just talk tough—it backs it up.

Smoky Mountain Knife Works, the world’s best online knife store, is a Tennessee landmark and the world’s largest knife store. Nestled in the Great Smoky Mountains, over 1.5 million knife fans walk through the doors each year to explore SMKW’s massive showroom and discover blades they won’t find anywhere else.