The DIAMOND GEN 4 blends elegant styling with high-level performance, featuring a distinctive triple diamond ring design inspired by layered jewellery bands. Each ring section incorporates unique groove depths and cut patterns, creating multiple grip textures that improve control, reduce slippage, and help players consistently lock into the same finger position throw after throw. It delivers a refined, premium feel while still offering the precision serious players demand.
Finished with striking red line accents inspired by Kosuzu’s signature colour palette, the DIAMOND G4 carries a bold and energetic presence. The vivid detailing contrasts beautifully against the sleek black coating, giving the barrel a sharp modern aesthetic while representing confidence, passion, and competitive intensity.
Built around a versatile straight barrel profile, the DIAMOND G4 offers balanced handling suitable for a wide range of throwing styles and skill levels. The front section features softened shark cuts for a smooth, controlled release, while the centre combines geometric diamond milling with ring grooves for enhanced grip feedback and visual detail. At the rear, alternating mild shark cuts provide reliable traction without feeling overly aggressive, helping players maintain a stable and repeatable grip.
Combining fashion-inspired design with tournament-ready functionality, the DIAMOND GEN 4 continues the evolution of the DIAMOND series with a perfect balance of style, comfort, and performance. Elegant yet powerful, this is a barrel designed to stand out both visually and on the scoreboard
On Point verdict
Diamond G4 combines a straight outline with several deliberately different grip textures. Front shark cuts lead into diamond milling and rings at the centre, with another shark-cut section at the rear. It should interest players who use more than one contact area, provided those transitions fall naturally beneath their fingers.
Storage
Flights & shafts
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Replacement points