Bear OPS Song IV Butterfly Knife Carbon Fiber (4.38" Satin) B-400-AICF-S

MSRP: $149.99
Our Price: $99.95
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Item #BHQ-21855


  • Overall Length:9.75"
  • Blade Length:4.375"
  • Blade Material:Sandvik 14C28N
  • Hardness:58-60 RC
  • Blade Style:Clip Point
  • Blade Grind:Hollow
  • Finish:Satin
  • 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-S 35017
  • 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 satin finished stainless steel clip point blade has a double tang pin design for great performance.


Customer Reviews

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Well, Its Not Bad.
Josh V.
For The Money, Its Ok,, But It Could Stand To Be Much Better, My Blade Came Relatively Dull, The Latch Itself Is Good, But The Aluminum Handles, Not So Much, The Coating Will Wear Off Around The Lower 1/4 - 1/2 Inch Of The Knife From Droppage And The Latch And Tang Pins Smashing Into It, And Likewise, The Soft Aluminum Will Eventually Smash Itself Around The Tang Pins To Where It Renders The Latch Useless, The tang Pins Are Nice And Large, The Spacers Are Great As Well, Good Big Sturdy Heavy Things They Are, And They Prevent The Latch From Hammering Away At The Tip, The Blade Steel Doesnt Seem To Hold An Edge Exceptionally Well, And The Handles Overall Suck, But Theyre Strong Enough To Resist MANY Drops On Every Surface, They Just Get Hammered Up By The Steel, And The Knife Is Exceptionally Wide If Youre Used To Cheaper $20.00> Knives Or Even Most Quality Knives Like The Benchmade 51, But Thats The Cost Of Strong Aluminum, I Would Suggest It If You Decide You Like Where Your Cheap $20.00> Balisong Flipping Is Going And You Would Like Something More, But Dont Expect To Find The Holy Grail With This Thing, Out Of Bad, Good, Better, And Amazing, This Thing Is Better.