SOG Seal FX Tanto 4.3" Tactical Fixed Blade Knife - Black
- Blade Type:
- Tanto
- Blade Material:
- CPM S35VN SS
- Bade ength:
- 4.30"
- OAL:
- 9.20"
- Handle Description:
- Black
- Edge Type:
- Plain
- Weight:
- 7.20 oz
- Sheath:
- Kydex
The SOG Seal FX Tanto 4.3" tactical fixed blade knife is a purpose-built workhorse for serious users who demand reliability in the field. Born from direct feedback from professional operators, this American-made blade cuts a clean, capable profile whether you're on a tactical mission, managing camp chores, or handling everyday cutting tasks where a fixed blade makes sense. The 4.3-inch tanto blade profile—that distinctive angular point—excels at piercing and controlled slicing; paired with CPM S35VN steel hardened to Rc. 58-60, it holds an edge longer than softer stainless and resists corrosion in wet environments.
What sets the Seal FX apart is its no-nonsense construction. The blade wears a durable black Cerakote finish that shrugs off fingerprints and wear. The handle is 30% glass-reinforced nylon—tough, lightweight, and textured enough to stay put in your grip even when wet or gloved. At 7.2 oz, it won't burden you on a long patrol or backcountry push. The straight edge takes a wicked sharp grind and is easy to maintain in the field with a simple stone or steel.
The Seal FX ships with a kydex sheath in matching black, designed for solid retention and quick deployment from belt, pack, or tactical rig. Kydex is proven to outlast leather in harsh conditions—no rot, no mildew, just consistent performance. The sheath itself is customizable, so you can rig it to suit your carry preference. This is a knife that earns its place in a professional kit, a backcountry pack, or anywhere the task demands a fixed blade you can trust.
Key Features
- CPM S35VN stainless steel blade hardened to Rc. 58-60 for edge retention and corrosion resistance
- Tanto blade shape—excellent for piercing and precision cuts
- American-made construction designed with feedback from professional users
- Black Cerakote finish resists wear and corrosion
- 30% glass-reinforced nylon handle for durability and grip in wet conditions
- Includes customizable kydex sheath for secure carry and quick deployment
- Lightweight at 7.2 oz for extended field use
Specifications
| Overall Length | 9.20" |
| Blade Length | 4.30" |
| Blade Thickness | 0.19" |
| Weight | 7.20 oz |
| Blade Steel | CPM S35VN |
| Blade Hardness | Rc. 58-60 |
| Blade Edge | Straight |
| Blade Shape | Tanto |
| Blade Finish | Black Cerakote |
| Handle Material | 30% Glass-Reinforced Nylon |
| Handle Color | Black |
| Sheath Material | Kydex |
| Sheath Color | Black |
| Made in | USA |
Frequently Asked Questions
What's included with the SOG Seal FX tanto knife?
The knife ships with a black kydex sheath designed for secure retention. The sheath is customizable, allowing you to adjust carry method and position to fit your rig or kit.
What's the blade steel, and how hard is it?
The Seal FX uses CPM S35VN stainless steel, hardened to Rc. 58-60. This hardness range balances edge retention with corrosion resistance and ease of field maintenance, making it a solid choice for tactical and field work.
Is the SOG Seal FX tanto blade good for tactical use and everyday tasks?
Yes. The tanto point excels at piercing and controlled cuts, a profile trusted by professionals. The straight edge is easy to sharpen, and the overall design is proven for both tactical operations and practical camp or field work.
How much does this knife weigh, and is it suitable for extended carry?
At 7.2 oz, the Seal FX is lightweight enough for all-day carry without fatigue, whether on a belt, pack, or tactical vest. The glass-reinforced nylon handle keeps weight minimal while maintaining durability.

