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Butterfly Trench Knife – 5-Inch Serrated Blade, Stainless Steel, Removable Knuckle Guard, Latch Safety, 11-Inch Overall, Black, Plasma, or Steel

SKU: ST-BK-1
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Original price was: $36.60.Current price is: $31.11.

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This isn't your average butterfly knife. It's a heavy-duty trench knife with a 5-inch serrated blade, a removable knuckle guard, and the full butterfly mechanism. All metal, all business. The knuckle guard screws on and off, so you can run it either way. Available in black, plasma, and stainless steel finishes. At 11 inches overall, this is a serious piece of hardware.
  • 5-inch serrated blade — the longest butterfly knife in our lineup
  • Removable stainless steel knuckle guard for versatile configuration
  • Full butterfly mechanism with latch safety for secure closure
  • 11 inches overall, all-metal construction — heavy-duty build
  • Available in black, plasma, and stainless steel finishes

A Butterfly Knife Built Like a Tank

Most butterfly knives are slim, lightweight flippers. This one’s different. The Butterfly Trench Knife combines the classic butterfly mechanism with a knuckle guard and a 5-inch serrated blade. It’s all metal, it’s heavy, and it means business. The knuckle guard is screwed on, so you can remove it if you prefer a standard butterfly profile. Three finishes — black, plasma, and bare stainless steel — each with the same solid construction.

Who This Knife Is For

This is a collector’s piece and a heavy-duty tool rolled into one. You’re someone who appreciates butterfly knives and wants one that’s built heavier than the usual fare. You might be a collector who displays these. You might be a butterfly knife enthusiast who wants something with more presence than a standard model. The knuckle guard adds a trench-knife aesthetic that appeals to people who like military-inspired hardware. This is not a beginner’s knife — you should already be comfortable with butterfly mechanisms before handling this.

Is This the Right Choice for You?

Choose the Butterfly Trench Knife if you want:

  • A heavy-duty butterfly knife with more mass and presence
  • A removable knuckle guard for two different configurations
  • A collector-quality piece with a serrated blade

Consider something else if you need:

  • A lightweight everyday carry knife (this is 11 inches and all metal)
  • A smooth-edge blade (this one is serrated)

The Knuckle Guard Difference

The knuckle guard is what sets this apart from every other butterfly knife on the market. It’s a stainless steel guard that screws onto one handle, creating a trench-knife-style grip. With it on, the knife has a completely different feel and look. Remove the screws and you’re back to a standard butterfly profile. It’s a modular design that gives you two knives in one, depending on how you want to run it.

The 5-inch serrated blade is the longest we carry in a butterfly-style knife. Serration gives you aggressive cutting ability on fibrous materials — rope, webbing, heavy packaging. The all-metal construction means this knife has real weight to it. The latch safety secures the handles when the blade is closed, keeping things locked down during carry or storage.

Quick Comparison: How Does a Self-Defense Knife Stack Up?

Feature Self-Defense Knife Pepper Spray Stun Gun Personal Alarm
Everyday Utility Cutting tool + defense ✓ Defense only Defense + flashlight Defense only
Range Arm’s reach 8-12 feet ✓ Contact only Audible range
No Batteries/Refills Always ready ✓ Expires Needs charging Needs batteries
Legal Carry Varies by state/blade length Most states ✓ Most states ✓ Legal everywhere ✓
Best For Utility + last-resort defense Distance defense Close encounters Drawing attention

Practical Details

Blade length is 5 inches with full serration. Overall length is 11 inches when open. Stainless steel construction throughout — handles, blade, and knuckle guard. Available in black, plasma (a multi-tone iridescent finish), and standard stainless steel. The knuckle guard attaches and detaches with screws. Butterfly knife laws are strict in many areas — check your local regulations carefully before purchasing, as they may be restricted or outright prohibited in your jurisdiction.

Built heavy, looks serious, flips with authority — this is the butterfly knife that stands apart from the rest.

Frequently Asked Questions

Is this good for learning butterfly tricks?

Not really. The weight and the knuckle guard make it heavier and bulkier than knives typically used for flipping practice. If you want to learn butterfly knife tricks, start with a lighter trainer. This is a heavy-duty piece designed for people who already know what they’re doing.

What does the plasma finish look like?

Plasma finish has an iridescent, multi-tone look that shifts colors depending on the angle and light. Think oil-slick metallic — purples, blues, and golds that change as you move the knife. It’s the most visually striking of the three options. Check the product images for the best sense of how it looks.

Are butterfly knives legal?

Laws vary widely. Some states allow them, some ban them entirely, and others have specific restrictions. Butterfly knives are one of the most heavily regulated knife types in the U.S. Always check your state and local laws before purchasing. We sell them where legal — it’s your responsibility to know the rules in your area.

Type of KnifeButterfly
Overall Length11 inches
Blade Length5 inches
Handle MaterialStainless Steel
SafetyLatch

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