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Cold Steel AD-15 Scorpion Lock Knife 3.68 Inch CPM-S35VN Satin Blade OD Green G10 Handle 58SQ UPC 705442018681
Product Description
The Cold Steel® AD-15 (SKU: 58SQ / UPC: 705442018681), engineered in direct collaboration with custom knifemaker Andrew Demko, represents a pinnacle evolution in hard-use tactical folders. Designed for extreme utility, combat defense, and uncompromising everyday carry, the AD-15 introduces Demko’s patented Scorpion Lock architecture. This mechanical interface redefines folding knife lock integrity by making the user's natural grip force an active reinforcement to the locking system, delivering fixed-blade reliability in a rapid-deployment platform.
The blade is precision-crafted from premium Crucible CPM-S35VN powdered metallurgy stainless steel, heat-treated to an optimal 58–61 HRC. S35VN incorporates niobium, vanadium, and chromium carbides to provide exceptional edge retention, structural toughness, and superior stain resistance under wet and abrasive field conditions. Measuring 3.68 inches with a robust 0.150-inch (3.8 mm) blade spine, the broad drop point profile features a high-performance flat grind designed for clean slicing cuts, heavy push-cutting, and piercing structural materials without edge rolling or micro-chipping. The blade is finished with a refined satin polish that shrugs off surface friction and preserves clean aesthetic lines.
Engineered for maximum grip security and torsional rigidity, the AD-15 utilizes a two-piece handle chassis. The lower half features high-traction, 3D-machined OD Green G-10 scales over stainless steel liners, providing an aggressive non-slip texture even in wet or gloved hands. The upper spine consists of a CNC-machined 6061-T6 aluminum billet yoke housing a heavy-duty compression spring. Deployed effortlessly using the ambidextrous dual thumb studs on smooth phosphor bronze pivot washers, the knife rides deep and secure in pocket via an ambidextrous, heat-treated stainless steel tip-up pocket clip.
*Bladesmith Bench Notes & Field Maintenance Guidance:*
Deployment, Carry & Metallurgy Advisory: Features Andrew Demko's patented Scorpion Lock with a 6061-T6 aluminum yoke, phosphor bronze pivot washer assembly, premium CPM-S35VN stainless steel, and a reversible tip-up carry configuration. CPM-S35VN offers high corrosion resistance but should be dried thoroughly after exposure to saltwater, acids, or harsh chemicals. Sharpening should be maintained on diamond or ceramic abrasives at a consistent 18 to 20 degrees per side. Fasteners use standard T6 and T8 Torx hardware; always use medium-strength blue threadlocker when reinstalling pocket clip screws to prevent thread stripping in aluminum and G-10 liners. Fully manual opening complies with federal, Texas, and most municipal knife carry statutes.
- Verify the blade path and work area are completely clear of obstructions, keeping fingers clear of the blade track and locking bar path during initial inspection.
- Inspect the Scorpion Lock yoke and tang engagement notch, wiping away any factory anti-corrosion grease or shipping debris with a microfiber cloth and rubbing alcohol.
- Configure the stainless pocket clip for left-hand or right-hand tip-up carry using a quality T6 Torx driver, securing threads with a small drop of non-permanent blue threadlocker.
- Apply 1-2 drops of premium low-viscosity synthetic pivot lubricant directly to the phosphor bronze pivot washers and along the lock yoke contact points; maintain edge geometry at 18–20 DPS.
- Execute manual deployment via the thumb studs to confirm zero vertical lock rock, zero horizontal blade play, smooth spring return, and perfect blade centering when closed.
Key Features
- Crucible CPM-S35VN Stainless Steel: Premium powdered metallurgy alloy heat-treated to 58–61 HRC delivers superior wear resistance, extreme toughness, and high corrosion immunity.
- Patented Andrew Demko Scorpion Lock: Features a 6061-T6 aluminum billet yoke where palm pressure directly reinforces lock engagement against the blade tang notch.
- 3D-Machined OD Green G-10 Scales: Ergonomically contoured handle scales provide rock-solid grip traction, high impact resistance, and imperviousness to temperature swings and moisture.
- Fully Ambidextrous Architecture: Dual stainless thumb studs, symmetrical lock access, and a reversible tip-up pocket clip ensure seamless operation for left- and right-handed users.
Product Specifications
- Brand: Cold Steel®
- Model/Series: Demko AD-15 Scorpion Lock Folder
- MPN / SKU: 58SQ / CS58SQ
- UPC: 705442018681
- Blade Length: 3.68" (93.5 mm)
- Blade Thickness: 0.150" (3.8 mm)
- Overall Length (OAL): 8.50" (215.9 mm)
- Closed / Handle Length: 5.00" (127.0 mm)
- Blade Steel: Crucible CPM-S35VN Stainless Steel (58–61 HRC)
- Blade Style / Grind: Drop Point / Spear Point, Flat Grind
- Blade Finish / Color: Satin
- Edge Type: Plain Edge
- Handle Material / Color: 3D-Machined OD Green G-10 & 6061-T6 Aluminum Yoke
- Locking / Action Mechanism: Scorpion Lock, Dual Thumb Stud Manual Opener
- Pocket Clip / Sheath: Reversible Stainless Steel Tip-Up Pocket Clip (Ambidextrous)
- Weight: 6.50 oz (184.3 g)
- Country of Origin: Taiwan
