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Strong light, and still bomber.

The Mammut Bionic Mythos HMS Carabiner's I-beam construction provides tons of strength while decreasing weight to a minimum. Its pear shape works very well for belaying and rappelling, and a large basket helps when you need to clip in to a cluttered belay point. Mammut likes to keep things simple and functional, so it stuck with a basic screw gate to make this 'biner worthy of your trust.

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Review Summary
14 4
3 3
1 2
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Mammut Bionic Mythos HMS Carabiner

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Here's what others have to say...

5 5

Super Awesome Carabiner!

The Carabiner is extremely light-weight. It's twist lock is smooth and really easy to clip in with. Excellent design makes it both reliable and looks great. You get a super awesome carabiner for an affordable price; win win for you. Seriously this carabiner is a deal you don't want to miss out on.

5 5

Sweet Lockers!

  • Familiarity: I've used it several times

Just got a couple of these for my fiance and she is stoked.

Great locking carabiner with a cool twist... It has an uneven twist in the release action that is wonderful. Its easy to rope up etc.

This is the first time we've gone with a Mammut carabiner and have to tell you, for the price this thing is amazing. It locks down tight whereas others become loose quickly.

Great product at a friendly price!

5 5


  • Familiarity: I've used it several times

I love this biner. It's large, attractive, good gate action, smooth screw lock, and did I mention it's attractive? This is my new favorite biner. I love using this thing when belaying or setting up an anchor.

5 5

My go-to biner.

  • Gender: Male
  • Familiarity: I've put it through the wringer

Looks sick, super light. Very easy to open (I really don't prefer anything other than screw-gate, but this twist lock works well). Has held up to use, quite rugged.

Responded on

Also, this biner weighs 2.75 oz (78 grams)

4 5

Nice and light

Nice light Carabiner. The twist lock is a bit sticky but I still think a twist lock is a good safety feature. Recommended buy.

4 5

Big and light

For this size this locker is really light. I use it with a Mammut Smart Alpine belay device and it works great. The gate and screw lock are very smooth. I have owned two of them because the first wore out. They do ware out a little faster than I would like but that has to do with the I-beam construction which keeps the weight down. Round stock will last longer but won't be as light. If i lasted a little longer I would give it 5 stars.

4 5

Not in love with the twistlock

I love autolocker concept. I love knowing that the gate is locked as soon as it closes. What I don't like is how difficult it is to unlock. it took some time to learn to unlock the bionic one handed. Now that I can do it every time, it's fine. But it was frustrating at first (especially with gloves on an icy wall). Aside from my poor eye-hand coordination, the Bionic Mythos is pretty good. Great size for a belay and strong enough to rely on it.

5 5

Must buy

I usually prefer and buy screw locks rather than automatic lock, which i did in this case so only going to comment on the screw lock though i think the auto one is as good. Excellent roomy carabiner that fits almost everything including the kitchen sink. After having such a good experience with this one i bought the smart hms version. Never fails to lock and unlock easily especially when your in a tight space hanging on with one finger. oh and looks awesome

5 5

Love it!!

I bought a couple of these about a month ago and have been using them for belaying and to clip in. I'm very pleased with the design and size and shape. I have larger carabiners that I was using and though thier nice and all, theye're heavy compared to this guy, and because of the size of my other carabiners they would spin when I would I belay or climb. I didn't like it. With this carabiner it doesn't spin when I belay or climb. I love it! I will be buying more in the future.

5 5


I've been using this guy once a week for belaying at the gym for a few months now, and there is nothing I don't like about it. I looked at a lot of big belay biners before settling on one, and this just had a perfect feel in my hand. The gate is VERY snappy, and the sleeve spins nicely. I think this will be a great long term relationship.

2 5

Wearing very Quickly

Just bought this and after a week of solid use sport climbing there is already significant wear. I use a Mammut Smart belay device and that seems to hold the rope in one spot so perhaps that is part of the wear issue but there is already a groove and with the I-beam construction it has created a sharp/rough edge. My last belay biner was a DMM and it lasted for well over 2 years before developing a significant groove

3 5

I'm looking for another

Keeps twisting around so that it ends up sideways many times (the load is on the gate) while belaying. Otherwise, it's great...

5 5

goto belay/rappel biner

i love it! I use it for rappeling and belaying. The gate closure rubes a little bad on the biner when closing, but thats no big deal. its great!

5 5

worth every penny

Great biner. Love it in an autolocker for anchors and belays two climbers well with a reverso. Also a great sport climbing biner, and the suuuper large pear shape easily accommodates a munter hitch if your atc magically disappears or never showed up.

5 5

Very Nice

This biner is great. Lightweight for the size and cool looking.

What does the HMS mean?

Posted on

What does the HMS mean?

Responded on

Halbmastwurfsicherung. Mouthful, isn't it? Also known as the Munter Hitch or the Italian Hitch, it's a link in a belay system that can be reversed with a wide enough 'biner, like this one.

Best Answer Responded on

HMS - Halb Mastwurf Sicherung (from German language) - it means half clove hitch belay. The sign HMS or H in a circle on a carabiner indicates that this carabiner is designed to be used with this kind of knot for belay or descending. The HMS carabiner is always locking and is generally oversized and pear-shaped one.
Minimal requirements: 20x7x7 kNa

What does HMS mean when describing a...

Posted on

What does HMS mean when describing a caribiner?

Best Answer Responded on

HMS just means that the biner is oversized and generally pear shaped and meant to be used for belaying or with a Munter hitch due to their bigger size, and it also tells you it will lock in most cases

Responded on

It's a German abbreviation for "HalbMastwurfSicherung" (=Munter hitch belay)

5 5

light and big

great size and does not weigh much .. love this for lead climbing the locking is great

5 5


This carabiner has a nice auto-lock mechanism that should last a while. Works great for belaying and looks cool too. Definitely a large biner

5 5


prefer the screw gate to the auto-locker, best looking biner i have found, and other than that its just another caribiner-there all the same-but this one looks sweet and im a fan of all mammut products.

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