
Mantis MT-8-S 'Vuja De' Balisong (Butterfly Knife)
This is a Mantis MT-8-S Vuja De butterfly knife, a distinctive tactical folder known for its unconventional design. The item features a 440C stainless steel blade with a modified American Tanto profile, characterized by its sharp angular tip and straight edge. The blade showcases a 'Stonewashed' finish, which provides a matte, textured surface designed to hide scratches. The handles are constructed from skeletonized stainless steel, finished in a matching bead-blast or stonewash grey. Notably, the skeletonization consists of rectangular cutouts that serve both to reduce weight and provide a more secure grip. The knife utilizes a sandwich-style construction with Torx screw fasteners, indicating a modern manufacturing era (likely 2010s). The tang of the blade is stamped with '440C', denoting the steel type. The condition appears used but well-maintained, with minor surface scuffs on the handle scales and some light pocket wear on the deep-carry pocket clip. The T-latch mechanism at the base of the handle is functional and intact. The design is unique for a balisong as the handle geometry is slightly curved, a signature element of the Mantis 'Vuja De' series, designed to improve ergonomics during both flipping and cutting tasks.
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Estimated Value
$65-$95
Basic Information
Category
Tactical Knives & Collectible Cutlery
Appraised On
January 10, 2026
Estimated Value
$65-$95
Additional Details Provided By Owner
User Provided Information
Mantis butterfly knife
Item Description
This is a Mantis MT-8-S Vuja De butterfly knife, a distinctive tactical folder known for its unconventional design. The item features a 440C stainless steel blade with a modified American Tanto profile, characterized by its sharp angular tip and straight edge. The blade showcases a 'Stonewashed' finish, which provides a matte, textured surface designed to hide scratches. The handles are constructed from skeletonized stainless steel, finished in a matching bead-blast or stonewash grey. Notably, the skeletonization consists of rectangular cutouts that serve both to reduce weight and provide a more secure grip. The knife utilizes a sandwich-style construction with Torx screw fasteners, indicating a modern manufacturing era (likely 2010s). The tang of the blade is stamped with '440C', denoting the steel type. The condition appears used but well-maintained, with minor surface scuffs on the handle scales and some light pocket wear on the deep-carry pocket clip. The T-latch mechanism at the base of the handle is functional and intact. The design is unique for a balisong as the handle geometry is slightly curved, a signature element of the Mantis 'Vuja De' series, designed to improve ergonomics during both flipping and cutting tasks.
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