Quartermaster Theodore "T.C." Calvin Karambit Knife (2" Stonewash) QTR-5F

MSRP: $210.00
Our Price: $144.95
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Item #BHQ-33510


  • Overall Length:6.00"
  • Blade Length:2.00"
  • Blade Thickness:0.19"
  • Blade Material:CTS-BD4P
  • Hardness:60-61 RC
  • Blade Style:Hawkbill
  • Blade Grind:Flat
  • Finish:Stonewash
  • Edge Type:Plain
  • Handle Length:4.75"
  • Handle Thickness:0.58"
  • Handle Material:G-10
  • Color:Black
  • Frame/Liner:Titanium
  • Weight:4.90 oz.
  • User:Right Hand, Left Hand
  • Pocket Clip:Tip-Up
  • Knife Type:Manual
  • Opener:Thumb Hole
  • Lock Type:Frame Lock
  • Brand:Quartermaster Knives (QTRMSTR)
  • Model:Theodore T.C. Calvin
  • Model Number:QTR-5F
  • Best Use:Tactical
  • Product Type:Knife


The QTR-5 Theodore "T.C." Calvin knife is the second karambit folder from QTRM5TR. It is smaller than the QTR-2, which makes it an excellent everyday carry tool. It has a premium BD4P steel hawkbill style blade with a stonewash finish. The handle utilizes the ball bearing ORB Pivot System for effortless and consistently smooth opening. The titanium frame lock and G-10 handle feel especially good in hand with refined angles and edges. The QTR-5 is set-up with a pocket clip for left/right reversible tip-up carry.

This knife is part of a numbered run of 300 knives. Includes certification of authenticity and number on blade.


Customer Reviews

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Chris f.
Hard to open and not a smoothe opening
Norman R.
Maybe I've been spoiled by owning mostly Benchmades, ZTs, and Spydercos... Unboxed #94 of 300 and my issues began the second I tried to open it. Gritty opening, like metal shavings or locked up bb... Think, yeah ok, my viper odino had a bit of grit until it broke in, maybe this is normal. After being in the pocket for an 8 hour work day ( only pulled it out and used it 4 times), I got home and pulled it out of my pocket to find that the pivot screw on the TI side had unscrewed itself and fallen out into the bottom of my pocket, Cute. Figuring the knife is already falling apart in my pocket, I go grab my torx set to just take it apart and investigate the grit. Find about a 2mm thick metal shaving stuck in one of the bearings. Remove that and go to reassemble the knife, and notice that whoever assembled the knife originally jammed the stop pin in sideways. Remove the screws for the stop pin to try and straighten it out, no dice, the liner on the g10 side was cut about .5mm off... so instead of tossing the improperly cut liner, they just tilted the stop pin slightly sideways and called it good. So I reassembled the knife and hit the pivot with some loctite... opens smooth and lock up is solid... overall I am happy with the knife except the slightly sideways stop pin and lack of QC checking the action on the opening. Lockup is solid around 20%, It would probably be around 15% if the stop pin wasn't slightly crooked.

All in all, a knife in this price range should be perfect out of the box, after screwing around with it for an hour and using some loctite, its about 90% the knife it could have been.
Karambit favorite!
Jared d.
I received this knife in small State of bad quality control, it had a loose/defective pivot screw and the steel insert on the lock bar was not fully seated with excess titanium on the reverse side. That being said, I wrote a service request for a replacement tri spoke pivot and the response was very quick and they even sent me a picture of the mailed package. As a knife maker myself I found it easy to fix these issues on my own and quartermaster provided a much appreciated response. I love the design of this Knife, very conpact, yet stout. It will be a very reliable tool once I replace the pivot. For me, price point was great in light of the qc issues, so it is worth it. I like this model better than the Spyderco, cold steel, and fox/Emerson versions.
I didn't think I would like this so much
Chris C.
Having purchased other QM knives in the past and having mixed results, I wasn't sure what to expect with the Calvin Karambit. This one however brings plenty to the table. Lock up is very good, not a hint of wiggle in any direction. Lock up is early at around 15 percent, so years of service are in the knife, Ergonomics is where it really shines though. I have smaller hands and the Calvin feels really nice in forward or reverse grip. Jimping is effective but not over the top. I had heard that the blade could be waved open but I was skeptical. This is 100 percent true. With a little practice you will be able to reliably wave deploy if you choose thanks to the small indent in the spine at just the right location. The titanium frame side looks great and with the matching wash on the blade, the Calvin is a beautiful little knife that will draw some attention for it's cool look and unusual but appealing pivots. Grab one before they are gone. The price is right and knife is fantastic. Well done Quartermaster. This one is a home run.