Benchmade Morpho 51BK – 4.25″ Black D2 Modified Spear Point Balisong, Black G10, Butterfly Knife
Benchmade Morpho 51BK – 4.25″ Black D2 Modified Spear Point Balisong, Black G10, Butterfly Knife
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The Benchmade Morpho 51BK is a lightweight balisong, or butterfly knife, built for smooth flipping and everyday carry. It features a 4.25" black-coated D2 tool steel crowned modified spear-point blade, machined and skeletonized black G10 handle scales over blue-anodized and jeweled 6AL-4V titanium liners, a spring-latch, and a laser-engraved blue-anodized titanium pocket clip. This listing is for the discontinued Benchmade Morpho 51BK.
Benchmade Morpho 51BK specifications
- Blade length: 4.25"
- Blade steel: D2 tool steel, 60-62 HRC, black coated
- Blade style: crowned modified spear-point
- Blade thickness: 0.100"
- Handle: skeletonized black G10 over blue-anodized, jeweled 6AL-4V titanium liners
- Lock: balisong spring-latch
- Pocket clip: tip-up, laser-engraved blue-anodized titanium
- Overall length: 9.35"
- Closed length: 5.40"
- Weight: 3.30 oz
- Made in the USA (Oregon City, Oregon)
Frequently asked questions
What is a butterfly knife (balisong)?
A butterfly knife, or balisong, is a folding knife with two counter-rotating handles that swing around the tang to conceal or expose the blade. The Benchmade Morpho 51BK is a balisong with a spring-latch that secures the handles closed or open.
How do you open the Benchmade Morpho 51BK butterfly knife?
Release the latch, then rotate the two handles apart around the pivots until the blade is exposed and the handles meet behind the edge. Flipping technique takes practice, and beginners often start with a trainer before using a live blade like the Benchmade Morpho 51BK.
Is the Benchmade Morpho 51BK butterfly knife legal?
Balisong and butterfly knife laws vary widely by state, country, and city. Some places restrict ownership or carry. Check your local laws before buying or carrying the Benchmade Morpho 51BK.
Does the Benchmade Morpho 51BK come with LifeSharp service?
Yes. The Benchmade Morpho 51BK is covered by Benchmade LifeSharp, the lifetime service that cleans, adjusts, and re-sharpens the knife to a factory edge.
Where is the Benchmade Morpho 51BK made?
The Benchmade Morpho 51BK is made in the USA at Benchmade's factory in Oregon City, Oregon.
Where can I buy the Benchmade Morpho 51BK?
You can buy the Benchmade Morpho 51BK from Going Gear, an authorized Benchmade dealer. This model has been discontinued by Benchmade, so availability is limited to remaining stock.

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