Protech TR-4.3 Tactical Response 4 Automatic Knife (4" Black)

MSRP: $350.00
Our Price: $229.95
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Item #BHQ-6330


  • Overall Length:9.25"
  • Blade Length:4.00"
  • Cutting Edge:3.50"
  • Blade Thickness:0.13"
  • Blade Material:154CM
  • Hardness:59 RC
  • Blade Style:Drop Point
  • Blade Grind:Flat
  • Finish:Black
  • Edge Type:Plain
  • Handle Length:5.25"
  • Handle Thickness:0.52"
  • Handle Material:Aluminum
  • Color:Black
  • Frame/Liner:Aluminum
  • Weight:5.50 oz.
  • User:Right Hand
  • Pocket Clip:Tip-Up
  • Sheath:Nylon
  • Knife Type:Automatic
  • Opener:Push Button
  • Lock Type:Plunge Lock
  • Brand:Protech
  • Model:TR-4
  • Model Number:TR-4.3
  • Country of Origin:USA
  • Best Use:Tactical
  • Product Type:Knife


The TR-4 is a whole new take on Protech's popular Tactical Response line. It incorporates a much requested sliding safety on the front of the handle. This TR-4 features a 4" black DLC finished 154-CM steel blade with a plain edge. The ergonomic handle is black anodized T6 aluminum. The TR-4 is a knife that will not let you down. It fires hard, locks up like a rock (what else would you expect from Pro-Tech?) and feel great. The TR-4 has a pocket clip (tip up) on the back of the knife for easy carry. Also includes a black nylon sheath.


Customer Reviews

Write a review for this item
Protect..... what else needs to be said
Eric J.
When you open this blade it DEMANDS ATTENTION! For such a large blade it whips out super fast and has quite a bit of torque! Locks up every time just like you would expect from Protech excellent quality and style.
This was my first ever pocket knife.
Nathan M.
Did I go overboard? Well, maybe.... but who cares! I LOVE this knife. It fires every single time perfectly, and is solid as a rock. I love that Wisconsin no longer has those stupid restrictions on knives from outdated laws. Thank you KnifeRights and thank you Governor Scott Walker!!!

Let's go over some pros and cons:

- 154CM Steel, great edge out of box, nice, well-rounded steel. Great edge retention, ability to sharpen, and corrosion resistance (especially with DLC coating).
- Made in the good ol' U.S of A.
- Absolutely no blade play at all. ROCK SOLID
- Cool black tactical design with DLC coating that matches the aluminum well
- External thumb Safety ... just in case (I usually have it off anyway, but I like having it nevertheless).
- Glass Breaker Pommel that is also the lanyard hole, WHICH IS ALSO THE BACKSPACER (incredible design)
- I like that it is serialized and shows you what number you have. Mine is Production 8 / Serial Number 181.
- Comfy Finger Choil for detail work.
- Comes with a sheath
- Right hand tip-up carry only (GOOD)

- Black DLC coating gets scratched off from regular use too easily IMHO.
- Doesn't really have any jimping anywhere for grippage.
PT never fails!
Mike H.
I've had this knife for about six months now and wanted to hold off on my review. This knife is amazing and is my primary duty knife. The blade is sharp, action is fast, and overall quality is outstanding. I also like the steel glass breaker which can also be used to attach a lanyard. It is a bit larger than most pocket knives, but it's not heavy and has a relatively slim profile for its size. This knife has been used & abused and is still just as sharp as it was on day one. Highly recommended!