Subscribe to our Newsletter for exclusive offers!

Benchmade 51BK Morpho Bali-Song Butterfly 4.25" Black D2 Plain Blade, G10 Handles

Customer Reviews 4.600 Read 5 reviewsWrite a Review
Part Number: BM51BK
Manufacturer: Benchmade Knives
Retail Price: $290.00
Our Price:
You Save: $43.50 (15%)
Calculate Shipping Authorized Benchmade Dealer

BM51BK: 51BK Morpho Bali-Song

Benchmade Knives raises the bar on Bali once more! A patented liner-sprung latch opens with a squeeze, yet locks open, too. Solid, machined slab construction is built on jeweled ti-liners. Heat-treated kicker pins keep things rockin’ hard and fast, and a practical blade shape is detailed out with a crowned blade spine. Others may get all the press, but Benchmade still owns the glory when it comes to Balis and the 51 proves it. Again.
  • Bali-Song with premium D2 tool steel blade
  • Black G10 handles with anodized Ti liners
  • Movable Ti carry-clip
  • Blade Length: 4.25"
  • Blade Thickness: 0.100"
  • Blade Material: D2 Tool Stell
  • Blade Hardness: 60-62HRC
  • Blade Style: Crown Modified Spear-Point
  • Weight: 3.30oz.
  • Clip: Tip-Up, Blue Anodized Titanium
  • Lock Mechanism: Bali-Song w/ Spring-Latch
  • Overall Length: 9.35"
  • Closed Length: 5.10"
  • Class: Blue
  • Made in USA

UPC Code: 610953139155

Made in USA
Made in USA
This product is USA born and raised.
Pocket Clip
Pocket Clip
Includes a pocket clip for easy accessibility and a more secure carry.
D2 Tool Steel
D2 Tool Steel
This is a high carbon steel that is appropriate for use in hostile environments and is known for edge retention.
G10 Handles
G10 Handles
Formed in a sheet under high pressure by combining fiberglass and an epoxy resin binder. These handles are lightweight and shaped to ensure a solid grip.
4.600 (5 reviews)
4.6 out of 5 stars
5 star
4 star
3 star
2 star
1 star
5 out of 5
David M.
Springfield, Or
Oct 18, 2014
Pros: Pocket Clip, Handle Feel, Overall Quality
Cons: Sheath, None
Elegant, beautiful knife :D
I didn't want the coating because i love seeing the steel however D2 is known to be semi stainless so it does rust. This is my first butterfly knife but i absolutely love it. I tend to go all out so i won't feel the need to buy another. I havent had a benchmade disappoint, except from emptying my wallet. The one real gripe i do have is that benchmade no longer sales leather sheaths, and no sheath comes with the knife. However the clip does work fine making it an non-concealed carry as well as aiding in knowing which is the bite handle(which is very well named). The other smaller grip is the wish they made it with S30V steel, but it isn't a wilderness knife. If you're wondering about the handles it is low weight, and might taking some getting used to.
4 out of 5
Sep 04, 2013
Pros: Blade Material, Blade Sharpness, Lock Ease of Use, Weight, Ease of Opening
Cons: None
Balanced, Smooth and Sharp
This was my first Benchmade Bali-Song knife. I have used Bali-Songs in the past and thought it was time to step up to the big leagues. I ended up order three different Bali-Songs the 51S, the 51BK and the 62. I was a little leery of the weight of the handle that is the reason I ordered a 62. When I received the knife I was pleasantly surprised how nice the action was and the weight seemed to be a good weight. If the handle was just a bit heavier it would be perfect. I would say if the handle was solid titanium it would be perfect. There are times when I over flip because of the light weight, but I think with time I will learn the weight and get better with it. The knife is extremely sharp, fun to flip, and easy to carry. I would recommend this knife to anybody that was thinking about a Bali-Song. I do like my 62 but it is a little heavy and a little slower.
5 out of 5
Apr 16, 2012
Pros: Blade Sharpness, Lock Type, Handle Material, Overall Quality, Pocket Clip, Ease of Opening, Handle Feel, Weight, Lock Ease of Use, Blade Material
Cons: None
Great Balisong!
Not only is this balisong a great flipper, but with the D2 steel blade, the G10 handles, and the pocket clip, the 51 becomes a great EDC knife. Very sharp coming from the factory and the black coating looks sick! Of course don't expect it to stay looking perfect if you're going to be flipping it and using it to cut, and be aware of your state's laws concerning balisongs. There was a little too much handle play out of the box for me, but a little loctite and it is feeling wonderful so far! Some people complain about the weight, but I think it feels fine. It is light but not light enough to really affect your flipping after some time to adjust. I'm no expert flipper by any means, but it's just my opinion. The BM51 has to be one of the best production balisongs on the market right now!
Read all 5 Reviews »
Loading Reviews

© 1995-2015 by Howard Korn and KnifeCenter Inc. All rights reserved.

5201 Lad Land Dr, Fredericksburg, VA 22407 - 800.338.6799 (Phone Orders Welcome)