Black Diamond Big Gun

Priced: $109.90 - $109.95 Rated:   - 5 stars out of 5 by 28 reviews.
Black Diamond Big Gun
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Color: Gold
Available Colors:
Black Diamond Big Gun -

The Big Gun Harness by Black Diamond is loaded with features to make your long days laboring in the vertical more comfortable and efficient. Organization of monster nailing racks is A1-simple on the Big Gun's seven color-coded gear loops. Two belay loops (color coded, as well) ensure simple, separate connections with daisies or a belay device, and the haul loop is rated to 12 kN. The bullhorn-shaped waistbelt (five inches wide in the crucial-to-comfort lumbar region) is constructed with ultra-luxurious thermoformed dual-density foam, and the leg loops are fully adjustable and removable-a must-have for fine-tuning fit over layers, scoring some solid zzz's on the portaledge or using the big-wall lavatory. The Big Gun comes with a holster (and two holster slots) to stow your hammer when you're not slinging iron.

FEATURES of the Black Diamond Big Gun Harness.
SPECIFICATIONS of the Black Diamond Big Gun Harness.


  • 420d nylon twill + 420d nylon oxford
  • 4-way nylon stretch woven
  • Waistbelt is constructed with ultra-luxurious thermoformed dual-density foam

Lining and Layers:

  • Full-strength haul loop for your tag line
  • Leg loops are fully adjustable and removable -a must-have for fine-tuning fit over layers, scoring some solid zzz's on the portaledge or using the big-wall lavatory


  • Bullhorn-shaped waist belt is 5 in. wide in the crucial-to-comfort lumbar region
  • Extra-wide everything for improved comfort at hanging belays


  • The Big Gun comes with a holster (and two holster slots) to stow your hammer when you're not slinging iron
  • Thermoformed foam bullhorn waistbelt with trad buckle
  • Two color-coded belay loops ensure simple separate connections with daisies or a belay device
  • Seven gear loops to hold everything you need for an A4 pitch
  • 2 color-coded belay loops and 12 kN-rated haul loop
  • 1 lb 7 oz (660 grams) Medium
  • Belay loop is rated to 15 kN
  • Organization of monster nailing racks is simple on the Big Gun's seven color-coded gear loops
  • Left or right holster slots with one hammer holster included
  • For safety and/or sanitary reasons, this product CANNOT be returned
Black Diamond Big Gun Rock Climbing Harness - The Big Gun Harness by Black Diamond is loaded with features to make your long days aiding in the vertical more comfortable and efficient. Built to provide maximum function on the big walls of the world, the Big Gun is the ultra-comfortable wall harness with extra padding, 2 belay loops and 7 customizable gear loops for epic belays and marathon aid pitches. A thermoformed foam bullhorn waistbelt with trad buckle and adjustable, removable leg loops makes this harness extremely supportive and comfortable. When you are looking for versatile and durable in your rock climbing gear, look no further than the Big Gun Rock Climbing Harness by Black Diamond.
Rock/Creek Outfitters

The Black Diamond Big Gun Harness is the ultimate in comfort and efficiency for any big wall, aid climbing endeavor. With the Big Gun's seven color-coded gear loops you can efficiently place your gear in their respectful places, creating a much better way to find your pieces quickly. Two belay loops (color coded as well) provide a simple, yet separate connection with daisies or a belay device and is rated to 15 kN for a safer connection.
An incredibly wide, bullhorn shaped waistbelt gives you extreme comfort as you sit belaying an aid pitch, and an ultra luxurious thermoformed dual density foam is added for those long days in the vertical. The leg loops are fully adjustable giving you a secure fit when changing layers or using the bathroom, and the Big Gun also comes with a holster (and two holster slots) to stow your hammer when your not pounding in bashies or copperheads.
Black Diamond created the Big Gun Harness to give you every comfort and convenience when you start up a 20+ pitch big-wall climb. This harness includes seven gear loops to hold a massive aid rack, and two belay loops to help organize the tangle of ropes and daisy chains when you're leading. Black Diamond also loaded the Big Gun Harness with enough padding to keep you comfortable at a multi-hour hanging belay while your partner does battle above you.

The Black Diamond Big Gun was designed for multi day big wall ascents, where hanging belays and tons of gear are the norm. The Big Gun has a thermoformed bullhorn waistbelt with a trad buckle. Seven color coded gear loops and two belay loops give you all the clip in points you'll need. This is the harness for livin' on the wall.

Mountain Gear
Aim high with the Big Gun harness from Black Diamond.
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Average Price History: Price History
Review RatingNumber of Reviews
Adjustable Leg Loops:yes
Belay Loop:Yes
Country of Origin:Philippines
Fits Waist:27-39 in. (depending on size)
Gear Loop:yes
Gear Loops:7
Haul Loop:yes
Leg:24 x 28" / 61 x 71 cm
Leg Loop Type:Adjustable
Main Buckle Closure:Double-Back
Padded Leg Loops:Yes
Padded Waist Belt:Yes
Waist:36 x 39" / 91 x 99 cm
Weight:1 lb 7 oz / 660 g (M)
Weight (Grams):700 g
Compare specifications to related products.

Black Diamond Big Gun Reviews:


Great trad climbing harness

I got this harness to replace the Misty Mountain Cadillac. My favorite climbing is trad, and multi-pitch when I can get it. I bought it more for the 7 gear racks than I did for the big wide waist belt and leg loops, but I must say that's it's a nicely designed, comfortable-to-wear harness.
From the hundreds of harnesses out there, if you are looking for a harness with more than 4 gear-racking loops, your choices are suddenly limited to just a handful. The Big Gun has 7 gear racks, the odd one being the great idea of a wide rack extending all the way across the back 1/4 of harness -- perfect for that cordelette, extra lockers, your reverso or ATC guide, a couple of tiblocs and a bail biner. I broke this harness in on Estrellita, a 12-pitch adventure-sport route in Potrero Chico, Mexico, that takes 22 draws if you link pitches. The racking system ate all that gear without a burp. With 5 rappels at semi-hanging and hanging rap stations to get off, the Big Gun was very comfortable to hang in, but not too fat to climb and move around in easily. I also have climbed a couple of trad pitches and several ice pitches on TR. The leg loops were easy to adjust for heavy insulating layers.
The double belay loops sound like a cool innovation if you are aiding and hauling, but so far I haven't used more than one, since I generally belay and tie personal anchors directly into the 2 hard points. You can nest the one belay loop inside the other so it doesn't take up any more room than a single belay loop, but it's very THICK this way and a little harder to clip a biner into than a normal belay loop. I keep considering just cutting out one of the loops, but I'm afraid I'll regret it so I'll probably never do it.
My only beef is that the gear loops hug the waist belt too tightly instead of being tipped strongly outward, giving them less clearance and making them harder to clip gear into than most other harnesses I've used. To partially address this issue, the loops all are designed with the center angled outward a bit, and the first set of loops on each side hang down below the waist belt, further easing clipping. Still, I'm experimenting with clipping my draws up-and-out instead of down-and-in to address the limited clearance, which is annoying to re-learn but seems to help.
One last thing - this harness is definitely bigger and heavier than your old harness. It takes up more room in the pack, but if you like lots of racking options for gear, plus comfort for hanging belays, it's a great new option. A few minor issues aside, I'm glad I bought it.
Luke climber at Eastern Mountain Sports (EMS) on 01/01/2010

I recently purchased this harness for use during Big Wall climbing. Reading reviews about wall harnesses can be a little daunting especially when you don't have much experience aid climbing. I waited until I had about 20 aid pitches, and one major aid route (2 nights on the wall) under my belt before I purchased my first aid specific harness. After my first wall I had terrible "wall hips" that were bruised for day's after the climb, and I promised myself I would take strides to reduce this uncomfortable pain. So I practiced better hauling, and jugging techniques so that I wouldn't be constantly hanging in my crappy old harness until I had perfected my own systems. I believe that even if you have the biggest most plush wall harness out there (Yates Shield Harness) you will still experience "wall hips" if you're technique is bad.
Anyways like I was saying...after some practice I jumped in, and bought this harness. Once I received it I immediately loaded up every single gear loop with every last bit of gear I owned (which is wayyyyyyy to much) to see how this baby would sag once full loaded with a 3x rack + hauling gear. As with any harness you need to cinch it down tight to avoid having to 're-cinch' it a few pitches up, but you don't need to over tighten it to avoid harness sag. As for the multitude of gear loops I figured out a good system for myself.
We decided to climb Touchstone wall 5.8 C2 in a day without fixing, and my lead was the first few aid pitches. Immediately this harness began to show me why it stands apart from others. The 'Upper Tier' gear loop can be used to carry extra gear, but I feel like slings, and cams with snag to become a huge cluster. Instead I used these as my dedicated ladder/daisey clip in points...'Genius!' I thought to myself as I easily cruised up the first few pitches in an hour or 2. When waiting at the hanging belay's for my partner the harness felt like I was sitting in a Bosun chair (well not really, but it was real comfy), and I really new I was on the right track with this harness. The last thing the harness did to prove itself worthy was the upper free climbing pitches. All rated 5.8 to 5.10 (depending on your willingness, and level of psyche) the harness never felt clunky or bulky while free climbing.
All in all I would recommend this piece of equipment to any climber looking for a comfortable, versatile, and light weight aid/wall/multipitch harness. SEND IT!!

Greg Gavin at on 10/28/2011
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.
trail.biker at on 03/12/2013

I bought this harness when I was a pretty new climber. I haven't regretted that decision. This harness is unbelievably comfortable! I always tell people that my harness is made from Swedish Memory Foam that was developed by NASA (probably not true, but you get the point).
My friend is a route setter at the local gym, and he says this is the only harness that he can hang in for hours at a time without his legs going numb.
Also, the plethora of gear loops is fantastic!
Another cool feature, is the double belay loops. When I first bought the harness, I didn't really understand why there are two belay loops. But the first time I used them, I really appreciated their value! They come in handy more than I would have ever guessed.

thep446941 at on 08/22/2013

good bang for buck, nice features

i'm happy with this harness. you can hang lots of stuff on it. there are no fuzzy bits to provide padding comfort, but it doesn't need it. no need to worry about sweating in it or absorbing ice/water. the padding is built right into the harness. the split/dual belay loops comes in handy often. i don't use the extra holster often, but it's nice to have for an ice axe. i've used it in the snow and on rock climbing. i have big legs and the leg straps rub together when i walk, but i don't see how any harness can prevent that!
winksmith at Mountain Gear on 02/02/2011

Big Gun Harness

It's a great harness, it's as if you're sitting in a chair when hanging or belaying. Despite how big the back is and legs are they don't get in the way at all. It's super comfortable. It's not always the quickest to put on, but that might just be because it's still relatively new and as such a bit stiff. Overall this is a great harness, extremely comfortable, the gear loops are plenty and well placed. The two belay loops are great to have and wonderful for daisy chaining/belaying/anchoring, etc.
cabinfever at Rock/Creek Outfitters on 12/12/2008

Black DiamondBig gun climbing harness

I am an avid sport climber at the moment. However with the many gear loops on the harness, I believe it is going to be a great for me to transition into trad climbing. I also think it would be a good harness for big wall and possibly ice climbing. It is very comfortable and the wide waste belt gives a lot more support on your back and I think is great for hanging belays and rappelling.
Aaron the MI climber at Mountain Gear on 03/03/2009

Nice and Comfy

I really like how big and comfortable this harness is. I weight almost 200 lbs, and really like how well my weight is distributed. Perfect for long trad climbs, tons of gear loops and a hammer holster. I wish it had an elastic, velcro strip to assist when strapping on the waist belt, but other than that, no complaints. Mine was a little loose but I have room for extra clothes if its cold.
Roo1986 at Eastern Mountain Sports (EMS) on 11/11/2010

Best Harness Ever

This harness has room for all of your gear needs. I can almost hang my full rack on this harness alone. It is great for long climbs to moderate climbs. The gear loops are plentyfull and keeps your rack in order. It is very comfy and has lots of padded supprot for falls or rapells. The dual tie in loops are great to. This thing should be a work of art not a harness.
Otaku at Eastern Mountain Sports (EMS) on 10/10/2008

I wore this harness all day long while bolting routes in Colorado. The wide leg straps were especially nice while hanging on a rope for long periods of time. In addition to it's comfort and light weight, the seven gear loops were great keeping all my equipment organized.
I highly recommend this harness for climbing on long pitches, trade climbing, and route setting.

mwhp431608 at on 07/08/2013