CIVIVI Knives Sinisys Flippers

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Larger and more intimidating than nearly all other CIVIVIs, the Sinisys is a strong frame lock flipper than can do it all.
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CIVIVI Knives Sinisys Flipper Knife 3.7" 14C28N Black Stonewashed Clip Point Blade, Black G10 a…Retail price: $75.90, our price: $64.50
$75.90
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Common Questions About the CIVIVI Sinisys

The CIVIVI Sinisys stands out as a larger frame lock folder featuring a 3.7-inch clip point blade and a rugged, high-performance design.

How large is the Sinisys?
The Sinisys is a substantial folder featuring a 3.7-inch blade, making it one of the larger options in the CIVIVI folding knives lineup. Its size and clean clip point profile provide a long, unobstructed cutting path suitable for heavier tasks.
What blade steel does the Sinisys use?
Most Sinisys models are equipped with 14C28N stainless steel, which is prized for its high toughness and excellent edge stability. A premium variant is also available featuring a Damascus blade paired with a carbon fiber laminate handle scale.
What type of lock does the Sinisys have?
The Sinisys series utilizes a frame lock mechanism, which is a distinct feature since many other CIVIVI knives use liner locks. The locking side is constructed from stainless steel, while the show side scale is available in materials like burlap or G10.
Is the Sinisys pocket clip reversible?
Yes, the Sinisys features a deep carry pocket clip that can be reversed for either left or right side carry. This design allows the knife to sit low and discreetly in the pocket regardless of your preferred carry orientation.
Does the Sinisys use ball bearings?
The Sinisys pivot is equipped with ball bearings to ensure smooth and consistent flipping action. This pivot system, combined with a well-tuned flipper tab, allows for rapid one-handed deployment.
Why is the Sinisys considered a good value?
The Sinisys offers a high level of fit and finish and robust frame lock construction in the $65 range. It provides a lot of knife for the money by combining a large 14C28N blade with reliable deployment and a versatile high flat grind.