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The Heckler & Koch SP03 Tactical OTF Auto Knife (model 06HK004) is a compact, double-action out-the-front (OTF) automatic knife produced by Boker under license from Heckler & Koch. It's designed as a more everyday-carry-friendly and "California-legal" version of HK's larger OTF models (like the SP01 or SP02).
Key Specifications
- Blade: 1.89" clip-point, D2 tool steel, black finish (single-edge version is most common; thickness ~0.07")
- Handle: Matte black 6061-T6 hard-anodized aluminum, lightweight and durable
- Overall Length: ~5.08" (closed)
- Weight: 1.62 oz — very light for an OTF
- Mechanism: Double-action OTF (thumb slide deploys and retracts the blade automatically)
- Other Features: Integrated glass breaker at the pommel, pocket clip, tactical blacked-out look with HK branding
