Buck Paradigm Shift Automatic Knife Black G-10

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  • $209.99
  • Regular price $250.00

Buck Paradigm Shift Automatic Knife Black - Model # 0591BKS-B

The Paradigm Shift automatic knife deploys in an instant when the Shift Mechanism™ bolster lock is deactivated. Simply slide the Cerakote® coated bolster up and your knife is open! Denoted with gold fasteners, the Paradigm Shift is designed with premium S35VN steel and durable G10 handles to ensure edge retention, strength and durability. A Cerakote coated pocket clip allows for easy carry (where legal), and the bolster lock prevents accidental deployment. It closes the same way as opening- by sliding the bolster open to unlock the blade. Lock it closed by sliding the bolster back in place. 

Shift Mechanism

Our patented Shift Mechanism™ serves as an advanced locking and safety mechanism. It not only locks the blade open when extended, but also prevents accidental opening when the blade is closed.


An almost indestructible resin laminate that is resistant to heat, cold, chemicals, impact, and other abuse. These tough, durable qualities make G10 well suited for a knife that will get well used in extreme environments.

Made in the USA

At Buck, we are proud that this knife is made in the USA. The materials and workmanship involved in creating your knife will be done with the utmost care and will be free of defects.

Paul Bos Heat Treat

We are known for our blades. Buck Knives is a market leader in edge retention thanks to our steel selections and heat treat process pioneered by industry famous, Paul Bos, whose heat treating system has proven to be the best in the business. Each blade is put through a rigorous heat treat process and quality performance test. It is then tempered to the appropriate Rockwell Hardness through a heating, freezing, and reheating system. This gives you longer edge life, ease of resharpening, and a blade that will not fail you.

Forever Warranty

We warranty each and every Buck knife to be free from defects in material and workmanship for the life of the knife, and we will repair or replace with a new knife, at our option, any Buck knife that is defective. Buck Knives does not warrant its products against normal wear, misuse, or product modifications. Buck Knives are not intended to be used as hammers, chisels, pry bars, or screwdrivers.



BLADE LENGTH: 3" (7.6 cm)

WEIGHT: 4.8 oz (136.1 g)

HANDLE: Textured G10


ORIGIN: Made in the USA