Protech Tactical Response TR-4 Custom Irie Compound Mirror Polished Black Automatic TR-4.50

Model: PT-TR-4.50-CUSTOM
Manufacturer: Protech Knives
Out of stock

Note: Automatic Knives may not be shipped outside of the United States. Additionally we cannot ship to the following states: Delaware, Hawaii, Minnesota, New Jersey, New Mexico, New York, Pennsylvania, Virginia, Washington or the District of Columbia.

Blade Length Restrictions may apply to Connecticut and Vermont.


The Protech Tactical Response 4 is a full size, tactical, button lock automatic that is durable, comfortable, lightweight and fast in the hand. At just over 5 oz. it carries well while offering a robust 4-inch blade that is functional and versatile for utility and defensive use. This Custom version comes with a hand compound ground and mirror polished 154CM blade by custom maker Mike Irie with black aluminum handle and black mother-of-pearl button inlay. Each piece is serialized on the handle frame.

Brand new directly from Protech Knives, USA.

Blade: Made from 154CM stainless steel, the utilitarian drop point blade is equipped with a custom, hand mirror polished compound grind that offers exceptional slicing performance with dual hollow grinds and top swedge for powerful piercing ability. A stunning collector's piece, the mirror polished hollow grinds offer added corrosion resistance and cutting performance with satin flats for contrast. Automatic deployment is fast, smooth and reliable with a strong coil spring mechanism operated via the black mother-of-pearl inlaid button. A slide safety offers added safety in carry. 

Handle: 6061-T6 anodized aluminum makes the TR-4 tough and relatively lightweight with a black hard anodized finish that is durable and discreetly non-reflective. Milled finger grooves provide a comfortable and secure grip in the hand with subtle jimping for traction and plenty of real estate for even the largest of gloved hands. The two-tone DLC coated, hardened 410 steel back spacer has a generous lanyard hole and extends from the pommel for use as an impact tool. 

Carries via a right hand, tip-up, black stainless steel pocket clip.

Crucible 154CM: Originally developed as a stainless bearing steel, 154CM is an improved version of 440C with added molybdenum that offers improved resistance to pitting from corrosion, higher hardness for better edge retention and toughness similar to 440C. Similar to Hitachi ATS-34.


Overall Length 9.25"
Blade Length 4.03"
Sharpened Length 3.50"
Blade Thickness 0.12"
Blade Material 154CM
Blade Type Stainless
Lock Button Lock
Safety Slide
Closed Length 5.25"
Handle Thickness 0.50"
Handle Material Aluminum
Clip Stainless Steel
Weight 5.15 oz.
Country of Manufacture United States