Bear OPS Song IV Butterfly Knife Carbon Fiber (4.38" Damascus) B-400-CF-LD 36007

MSRP: $399.97
Our Price: $259.95
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Item #BHQ-37522 Online Only


  • Overall Length:9.75"
  • Blade Length:4.375"
  • Blade Material:Damascus
  • Hardness:58-60 RC
  • Blade Style:Clip Point
  • Blade Grind:Hollow
  • Finish:Gray
  • Edge Type:Plain
  • Handle Length:5.375"
  • Handle Material:Carbon Fiber
  • Color:Black
  • Weight:4.82 oz.
  • Knife Type:Butterfly
  • Brand:Bear Ops
  • Model:Bear Song IV
  • Model Number:B-400-CF-LD
  • Country of Origin:USA
  • Best Use:Recreation
  • Product Type:Knife


The Bear Song IV butterfly knife is the newest collaboration between BladeRunnerS (BRS) and Bear OPS. It is a lightweight flipper that is designed to be your go-to everyday carry knife. This B-400 model features carbon fiber handles, stainless steel spacers, and a swappable latch. The pivots have 304 bearing surfaces and phosphorus bronze washers. The damascus clip point blade has a double tang pin design for great performance.


Customer Reviews

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I love it, but...
Timothy P.
This is such a great knife. The balance is amazing, it flips so smooth, and it just looks beautiful. However it has a few down falls. The knife has several spots that can pinch my hand that make some tricks a tad uncomfortable and the blade was only kind of sharp. It didn't pass the paper test or the shaving test. Personally, when I buy a 200+ knife, I expect it to be sharp. However minor those may be, they do need to be taken into consideration. All in all, it really is a great knife, only a few minor setbacks. I definitely recommend it.