Bear OPS Bear Song IV Butterfly Knife Blue Raindrop (4.38" Satin) B-400-AIBD-S

MSRP: $145.00
Our Price: $89.95
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Item #BHQ-22572


  • 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:Blue
  • Weight:4.40 oz.
  • Knife Type:Butterfly
  • Brand:Bear
  • Model:Bear Song IV
  • Model Number:B-400-AIBD-S
  • 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 blue anodized aluminum handles with raindrop graphic overlays, 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

Write a review for this item
Not bad. If you like heavy you will hate this.
Dayton G.
For around a 90 dollar balisong, it's not a bad flipper. It's light, good balance, but I am not big on the finish, which is opinionated. This was my first Balisong and I have had it for a decent time now, I flipped it everyday. The screws will get loose but that's always fixable. I have noticed the latch is very loose and it gets caught when flipping and makes loud noises, again another fix. Like the title if you like heavy Balisongs, then you will despise this. I have had a pen break on me, but bladehq will send you another (they did with me at least) The latch does scrape paint off, so if you do care about the paint a lot then it will bother you.

Besides the annoying latch, for $90, you are getting a decent deal.
-Dayton Gulley
Ethan R.
This is the best butterfly knife I've ever owned!
Great knife
Ed L.
This is an amazing knife, well made with a handle you can get a good grip on and it has a perfect weight and balance.
The Truth
Rudy E.
I've bought all kinds of Bali's from 20 to 300 dlls.And this is the best one under 100. Its smooth and great quality. Overall a great buy. I own both 400 and 450 .