Black Diamond Big Gun Climbing Harness


  • 6" high
  • 9" wide
  • Thermo formed foam bullhorn waist belt with trad buckle
  • Two color-coded belay loops and 12 kn-rated haul loop
  • Left or right Holster slots with one hammer Holster included
  • Seven color-coded customizable gear loops


Brand: Black Diamond

Product Code:



In Stock

The ultimate big wall, aid climbing harness, the Big Gun is loaded with features to make your long days aiding in the vertical more comfortable and efficient.

  • Is Discontinued By Manufacturer: No
  • Product Dimensions: 15 x 9 x 6 inches
  • Item model number: BD651030TGLDS__1
  • Date First Available: January 12, 2004
  • ASIN: B0012E87YO
  • Amazon Best Sellers Rank: #325,821 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
    • #136 in Climbing Harnesses

    This harness is VERY heavy duty. Definitely set up for alpine use, NOT gym use. I have a couple of Petzels (Corax being one of them) I use for the gym and they are awesome for that application. This thing is very well padded and I love the size of the leg straps. They are much wider than other harnesses which makes it much more comfortable when you are hanging for longer periods of time. The second belay loop is super handy as well. I connect my rappel rig to one and my auto block from the other and it works great. It also has a ton of rack space for all your crap as well. Well worth the extra $$ for this thing. Like other reviewers have stated, I just wish it came in other colors.

    Good, comfortable harness for the price. I bought this for recreation and for the occasional tree climbing work I do at home/for friends/relatives. If I planned to do a full time job or a side job cutting trees, I would have invested in a more expensive harness that would be quicker to put on / take off.

    Pros: Comfortable when wearing and also when hanging/suspended from a rope. Good range of motion.

    Cons: No snap-buckles / quick-connects, so it takes some time to get on and off. DON'T GO BY THE SIZING CHART!!! Read the reviews before selecting a size! The size chart put me in a Medium harness based on my pants size (Men's 34-36), but after reading the reviews I bought the large. I'm so glad I did! Even in the Large size harness, I had to cinch it up pretty tight to try and get the 8 centimeters (3 inches) of excess strap outside the buckle that the instructions require. I have thick quads/hams, so I adjusted the leg loops out as much as possible. There was not enough excess to tuck into the strap loops that are there to keep everything nice and neat. I think if the manufacturer would make the adjustment straps 1 inch or 1.5 inch longer, it would be perfect.

    First Impressions: Well, as its name says, and as you can see in this picture, its BIG. But its really not all that heavy. If you're a minimalist and trying to trim the oz. off your gear, then it may put you off, but for those that are going to be hanging for a long time, the comfort this offers may be worth the few extra oz.

    Pros: The number one thing this harness has going for it is its comfort. The big pad in the back and wide leg straps make this thing almost a pleasure to sit in. In my capacity as a search and rescuer, long training hangs make comfort an important factor. Besides comfort, its got two full strength belay loops and a full strength haul loop off the back. Also equipped with plenty of places to hang all your gear.

    Cons: Slightly more expensive than your normal harness, if you find it on sale, it helps. But you should be able to find it for $90 with out too much work. And of course, weight, but if you're bringing rescue gear or just a lot of cams and nuts, then you're probably not going to notice it... and don't misread the weight issue, we're only talking a few oz here, not pounds. For most people, they probably wont even notice.

    Overall: If you like comfort and a full featured belaying harness, this is the one for you.

    This harness is great in many aspects, but expect the sizes to be way too smaller than indicated. I first bought M, the label says it's for 30-33'', I'm 32'' but this was really tight and the belay loop ended always somewhat to the side and not centered. I had to sell that one and ended up buying the large one. So if you are 32 or 33 forget the M size and go for L.

    I bought this for sport climbing because I wanted something comfortable. This harness lets me take a fast whipper without hurting my ribs like my Momentum AL harness did. This harness is heavier, but I don't notice that when I am wearing it. It is more durable than the BD Momentum AL harness I had before this one. One concern for me is that I have the leg loops on my medium harness adjusted almost as far out as they will go to accommodate my 24.25 inch (in climbing pants) quads. Be aware if you have massive legs. The only reason this harness did not get 5/5 is that the waist buckle should be a double buckle system. The one-piece design on this harness is a pain to deal with, especially when your forearms are fried from hours of climbing. The published sizing info is also off. My 33 inch waist is on the small end of the adjustments on a medium harness. A word on range of motion: I am very flexible and this harness does not restrict me at all, so don't be afraid of the wide belt, that is where the comfort comes from.


    My second rock climbing harness, spent a lot of time sport climbing but needed a harness better suited to multi pitch trad routes. This harness holds all the draws/cams/cordelettes you could ever want, and it holds the weight well. Very comfortable, nice to have extra leg padding when you're spending a long day at the crag.

    Great product as far as material goes. My only issue with it is the single adjustment strap for the waistband. Makes it difficult to get a custom feeling fit. Such as something you would get with a Petzl harness.

    Der Gurt lässt sich super einstellen und trägt sich sehr komfortabel ohne einschnüren bei Belastung. Die Beinschlaufen können sich nicht so leicht verdrehen, wie bei vielen anderen Gurten, wo man anfangs oft einmal falsch reinsteigt. Der Gurt kam in XL an (die Größe stand nicht in den Produktdetails).