BRS Alpha Beast Infinity Balisong Butterfly Knife Titanium (4.5" Stonewash)

Our Price: $459.99
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Item #BHQ-52452


  • Overall Length:9.875"
  • Blade Length:4.50"
  • Blade Thickness:0.14"
  • Blade Material:CPM-S35VN
  • Blade Style:Clip Point
  • Finish:Stonewash
  • Edge Type:Plain
  • Handle Length:5.50"
  • Handle Thickness:0.48"
  • Handle Material:Titanium
  • Color:Gray
  • Weight:4.73 oz.
  • User:Right Hand, Left Hand
  • Knife Type:Butterfly
  • Brand:BRS
  • Model:Alpha Beast Infinity
  • Country of Origin:USA
  • Best Use:Everyday Carry
  • Product Type:Knife


The Alpha Beast Infinity is a fine-tuned version of the original packed with next level quality, style, and performance. The blade is made from resilient CPM-S35VN stainless steel with a dark stonewashed finish and a crowned spine. It features rounded titanium handles that enhance overall grip and comfort. Comes complete with a removable contoured pocket clip for convenient carry.

The Alpha Beast is not only the flagship model for BRS, but possibly the front runner for the balisong flipper community. Designed by and for flippers, the BRS AB prides itself on breaking the accepted design cues of previous knives while fixating on weight, balance and tactility. All this, combined with premium materials, supplies a knife that is long overdue.

BladeRunnerS Systems (or -=BRS=-) is a company founded by balisong manipulators and knife/gear enthusiasts. Their mission is to produce high performance balisongs and gear with a design philosophy centered around performance, precision and quality. "For us it has to be right and has to flip right, we are performance grade, competition ready, battle tested...and looking forward to earning your business."

Please Note: After break-in period and tuning, please maintain pivot screws with thread locker. As with all Balisongs, we recommend checking the screws regularly.

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Customer Reviews

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Great Flipper and Great Quality
Matthew B.
Ive owned and flipped tons of high end balisongs, after owning the Infinity for roughly a week and a half Ive been really impressed with the overall quality and flippability of the knife, the s35vn blade steel makes for great edge retention and overall great quality, the rounding on the handles is good, but I've found its not quite as round feeling as I expected, the edges on the sides of the handles are kind of rough, but it's not a bad thing because it helps a ton when fanning. If I had to rate it out of 10, id probably give it a good 9.5, it's not quite perfect, but it has alot of good features
Great knife!
Gabe S.
I've never flipped anything other than Chinese crap, but when you pick this knife up, you know it's quality. The rounded handles allow for fanning and switching the orientation of the knife. The long handles are great for people with small or large hand, offering plenty of room for adjustments. The blade isn't too sharp straight from the box, but it it will bite you bad If you're not careful. The only downside to this knife is the pocket clip. It is Very tight and has such a small upward turn that it takes time to attach it to your pocket. Other than that, it's a great knife and I recommend it to anyone with the money.
A lot different than standard AB but still awesome
Braden W.
This knife is a great knife. It is significantly different from the standard AB.

Standard AB is heavier, more rear/ass biased weighting. Each standard and infinity have advantages and disadvantages flipping.

I'd recommend this knife to anyone, great knife.
Top tier flipper, great EDC
Frank D.
The Infinity has everything it needs to be both a fantastic knife for flipping as well as EDC. Slight rear handle bias balance allows for fluid and effortless rollovers and momentum based flips. The length allows you a lot of real estate to work with and the weight of it makes it very fast. Smooth is the best way to describe it. The rounded handles make for a very comfortable experience and feel great in the hand while flipping and cutting.

For EDC, this knife is near perfect. 4.7oz is a great weight for a very usable 4.5inch S35vn blade. Like all balisongs, utilizing the latch while the knife is open makes it a folding fixed blade. Full titanium handles, bushings, S35vn blade steel, and a great pocket clip mean it's hard to get any better for EDC.

The only downsides to this knife are the screws. Be very careful when taking this knife apart. The screwheads are known for shearing off and some knives come with heavy amounts of thread locker.

All in all, I can't see how you could improve much on the Alpha Beast design beyond the Infinity. If you're on the fence, just do it. Once they're out of stock who knows when the next batch will drop.
first day with it 10/10
Zack D.
I had my doubts about the thickness, smoothness and weight of it compared to the OG AB (which i havent handled). But this blew my expectations away. It is outstanding. So much better than the barebones or my flyti 51. The spine is so comfortable and the handles feel great in hand. 100% flipper friendly! 100% great.
Melinda B.
Great quality knife, very sharp, I mean very. But it's great. A lot lighter than I expected, but great balance. Really smith while you're flipping. I would recommend it to anyone who has the money for it.
Larry C.
I am desperately trying to learn to flip a balisong....I have to say, BRS has provided the best of the best in their balis.....goodbye BM 42....there's a new kid in town!!!
William C.
I'm pretty new to flipping, but this is a beauty! Fit and finish are absolutely top notch, very smooth right out of the box. Wicked looking blade, very sharp, with a nice rounded spine. The rounded scales feel great in the hand. Edges are crisp, but not uncomfortable. I like that they did away with the "tang wings" for a neat look. I've be flipping a barebones and a 51 for a while and the weight with the Ti scales feels perfect! I'm spoiled already.
Amazing functionality in a lightweight package
Dr. M.
Handling the Infinity for the first time is a surreal event. The blade, standing at 4.5" and yielding an astoundingly sturdy thickness, feels feather-light at just under 4.75 ounces. The finish is durable and lends itself to a firm grip no matter where you grab the handle. The pocket clip solidifies this knife as an everyday carry; ready for the harshest chores or the lightest tasks. The fluidity of the action is absolutely the best, even when compared to similarly priced Balisongs. I highly recommend this as a must-have for any Balisong, or knife enthusiast.