GiantMouse ACE RIV Black Titanium, Black M390

The GiantMouse ACE Riv Black Titanium is the kind of knife that immediately communicates quality the moment you pick it up. Designed by the acclaimed Danish duo Jesper Voxnaes and Jens Anso, the Riv is the compact cousin of the popular Biblio and GM line — and in many ways, it refines what a small EDC knife can be. First Impressions & Build Quality Right out of the box, the Riv impresses with its sleek, minimalist design and immaculate machining. The black PVD-coated titanium scales not only look stunning but also offer a durable, scratch-resistant finish. The anodized accents and clean lines give the knife a modern, almost tactical aesthetic without being overbearing. Despite its modest dimensions (a blade length of about 2.44 inches / 62 mm), the Riv feels incredibly solid and well-balanced in hand. It’s compact, yes — but it doesn't feel fragile or delicate. This is a knife that’s made to be carried, used, and appreciated daily. Blade Performance The blade is crafted from Bohler M390, one of the most respected steels in the high-end knife world. M390 is known for its exceptional edge retention, corrosion resistance, and overall toughness, making it ideal for a premium EDC. The Riv features a flat grind with a drop point blade shape — a perfect combination for everyday utility. Whether you’re opening packages, slicing food, or doing finer detail work, the blade bites in confidently and glides with precision. Ergonomics & Carry What makes the Riv stand out in the compact knife category is its ergonomics. The handle is incredibly well-contoured, with chamfered edges that eliminate hotspots during prolonged use. Even users with larger hands will find the Riv surprisingly comfortable, especially with the subtle finger choil that provides excellent control. At just 2.7 oz (about 77 g), the Riv is featherlight in the pocket, and the reversible wire clip ensures deep and discreet carry. The clip is minimal yet effective, and the titanium scales provide just the right amount of grip without tearing up your pockets. Action & Mechanism The Riv runs on caged ceramic ball bearings, and the action is buttery smooth. It’s a front flipper design, which may take a bit of practice for those unfamiliar, but once mastered, it’s quick, satisfying, and stealthy to deploy. The detent is dialed in perfectly — not too stiff, not too weak. Lockup is secure via a frame lock, with a steel lockbar insert that adds longevity and reliability to the mechanism. Everything feels tight, precise, and purpose-built. Conclusion The GiantMouse ACE Riv Black Titanium is a masterclass in compact knife design. It blends premium materials, excellent ergonomics, and stunning design into a knife that’s as much a pleasure to look at as it is to use. It’s small enough to disappear in your pocket but capable enough to handle serious tasks. Whether you're a collector, an enthusiast, or someone looking for a reliable high-end EDC, the Riv delivers on all fronts — and does so with style.