NKD on r/knifeclub: The Sage 6 in REX121 With RGT Scales Is 'Slicing in BEAST Mode'
New knife day posts are the lifeblood of r/knifeclub, and this week's standout is a Spyderco Sage 6 in REX121. The owner's verdict was delivered with the enthusiasm the hobby runs on: "It's my Godzilla knife that is slicing in BEAST mode. King of the knives!" The post pairs the knife with freshly installed RGT (Ripps Garage Tech) scales, a popular aftermarket upgrade that lets owners customize the Sage's handle without touching the core mechanism.
The Sage 6 is worth understanding because it is one of Spyderco's most refined platforms. It continues the Sage line's tradition of honoring lock designs — in this case the button-activated compression lock borrowed from the Spyderco Smock, which delivers the ambidextrous ease of a button lock with the reliability of a compression lock. It is a design that makes the entire open, use, and close cycle intuitive, which is why reviewers keep calling the Sage line one of the best production folders Spyderco makes.
The steel is the other story. REX121 is a high-speed tool steel that sits at the extreme edge of Spyderco's exotic steel rotation — a material with enormous wear resistance that rewards enthusiasts who prioritize edge retention above all else. It is not a steel for everyone: REX121 is demanding to sharpen and has less toughness than more balanced alloys, but for a dedicated slicer it offers performance that few production knives match. The pairing of an extreme steel with the Sage 6's thin, slicey grind is exactly the kind of combination that gets knife nerds excited.
Posts like this one matter to the broader conversation because they document real-world configurations. The Sage 6 is often discussed as an S90V or S30V knife — the REX121 variant is the one enthusiasts hunt for — and seeing one in the wild with aftermarket scales gives prospective buyers a concrete picture of how the platform can be personalized. The RGT scale swap is a particularly popular route for owners who want the Sage's ergonomics with a different handle texture or color.
For anyone weighing a Sage 6 purchase, the community consensus keeps pointing the same direction: the platform is excellent in any steel, and the REX121 version is a special animal. This NKD post is more evidence of both.