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

MSRP: $209.99
Our Price: $134.95
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Item #BHQ-50069 Online Only


  • Overall Length:9.75"
  • Blade Length:4.375"
  • Blade Material:14C28N
  • Hardness:58-60 RC
  • Blade Style:Clip Point
  • Blade Grind:Hollow
  • Finish:Black
  • Edge Type:Plain
  • Handle Length:5.375"
  • Handle Material:Carbon Fiber
  • Color:Black
  • Weight:4.71 oz.
  • Knife Type:Butterfly
  • Brand:Bear Ops
  • Model:Bear Song IV
  • Model Number:B-400-CF-B
  • Country of Origin:USA
  • Best Use:Recreation
  • Product Type:Knife


This Bear Song IV butterfly knife represents the latest 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 black finished stainless steel clip point blade has a double tang pin design for great performance.


Customer Reviews

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Great knife
David G.
This is my second balisong knife and honestly I love it. The carbon fiber handles are heavenly, the stainless steel blade looks great as well and it flips really smoothly. The weight is just right it's also very nicely balanced only thing that I didn't like was that the blade wasn't as sharp as I'd like it to be and the tip of the blade wasn't sharpened evenly but that's nothing a little sharpening can fix. Other than that it's a really great knife.