Kershaw Amplitude 2.5 Assisted Opening Knife (2.5" Satin) 3870

MSRP: $39.95
Our Price: $24.95
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Item #BHQ-21526


  • Overall Length:6.00"
  • Blade Length:2.50"
  • Blade Thickness:0.09"
  • Blade Material:8Cr13MoV
  • Blade Style:Drop Point
  • Blade Grind:Hollow
  • Finish:Satin
  • Edge Type:Plain
  • Handle Length:3.50"
  • Handle Thickness:0.33"
  • Handle Material:Stainless Steel
  • Color:Gray
  • Weight:2.45 oz.
  • User:Right Hand, Left Hand
  • Pocket Clip:Tip-Up
  • Knife Type:Spring Assisted
  • Opener:Flipper
  • Lock Type:Frame Lock
  • Brand:Kershaw
  • Model:Amplitude
  • Model Number:3870
  • Designer:Todd Rexford
  • Country of Origin:China
  • Best Use:Everyday Carry
  • Product Type:Knife


The Kershaw Amplitude 2.5 is a Todd Rexford designed assisted opening knife that is perfect for sleek everyday carry action. The blade is satin finished with a flipper opener. The 410 stainless steel handle is titanium carbo-nitride coated. Reversible left/right hand carry pocket clip.


Customer Reviews

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Small but great EDC
Alex M.
Good ergonomics for such a simple and small knife. Simple and great for the price.
First Flipper
Michael J.
My first flipper. Comparing to another flipper I've bought since (am3). I like this one. Good action, satisfying click when opening, comfortable flipper tab, and nice small slim size. Not the best for heavy use, or even cutting boxes.
Great Knife for the price
Michael J.
This isn't a para 2 or a zt, but for the price, it's a very nice knife with a great action.
Needs improvement
Edward P.
Perfect size for a pocket knife. I like the modified drop point blade profile. Opens fast and lock up is good with very little side to side movement.

I don't care for the spacer between the pocket clip and knife. It loosened after little use and rubbed a little of the finish under the clip. I just took mine off completely.

The knife doesn't have a safety but uses a detent pin on the frame lock to help prevent accidental opening of the knife. Consequently, you will need to apply some pressure to the flipper to open the blade. The detent pin also rides on the blade as it opens and closes. This is fine, however the scales should have been designed to hide this detail. Right now with the blade in the open position, you can see an arcing scratch near the base where the pin rides on the blade.

Overall the knife is good... could be better.
Awesome Little Knife
Daniel B.
Just got mine today. Beautiful clean lines. Reverses for me,, lefty!

It is everything I could ever want in a small knife. You push that flipper and when assist takes over it is smooth with a very decisive lock up.

Only one thing I would want more out of that knife. S90V with a boss HT. But then the price would be up there. I would settle for S30V or VG10. Or even the new not to expensive
CTS-XHP. (which is, per manufacture, a more stainless D2) and I just heard that some companies are HT'ing to 62 RC. Oh, and a small over travel stop on the frame lock.

But let's face it, for a knife under thirty bucks it's all the knife I could ask for.

I LOVE IT!! I give it five stars plus a 10/10 I LIKE IT.
Made in China
Brian H.
I like this design and size. There are not enought blades offered under 3 inches. However, I was very disappointed when I realized it was made in China. BladeHQ ad claims USA but it is clearly marked China.
Blade HQ response:
We will look into the origin- we apologize for any mistakes.