Bear OPS Bear Song IV Butterfly Knife Sim Carbon Fiber (4.4" Black) B-400-AICF-B

MSRP: $151.99
Our Sale Price: $89.95!
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Item #BHQ-36604


  • 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:Aluminum
  • Color:Black
  • Weight:4.40 oz.
  • Knife Type:Butterfly
  • Brand:Bear Ops
  • Model:Bear Song IV
  • Model Number:B-400-AICF-B
  • 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 aluminum handles with a simulated carbon fiber laminate. 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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First butterfly knife
Brandon T.
Carbon fiber handle feels good, looks less than perfect. Hardware is fine. Blade looks good and has a unique texture, but its super easy to chip. Tip chipped after falling from waist height onto wood. Not the best quality for the price but decent enough.