IA4K Pack System

From: $288.95

Rated 4.96 out of 5 based on 27 customer ratings
(27 customer reviews)

The IA4K pack system is the most  versatile  hunting pack system. This design is perfectly suited for the 5-7 day extreme backcountry hunting adventure. The seamless transition from  pack system  mode  to  day pack  mode  makes this system unparalleled in the market.

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BAG SPECS

  • Triaxial  carbon fiber frame  (the foundation of our  system)
  • Total weight with Platypus Big Zip 1.5L Bladder &The Pannier Load Carrier 6.5 lbs.
  • Total frame weight 19 oz.

  • 4000  cubic inch capacity (expandable to 6500 cubic inch capacity utilizing "The Pannier Load Carrier")
  • 500D Cordura
  • Made proudly in Idaho, USA

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4.96 out of 5 stars

27 reviews

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What others are saying

  1. Chris Y

    Rated 5 out of 5

    Chris Y

    Hands down the best pack system I have ever used. Doesn’t matter how much weight or how many miles you are going, I can guarantee performance and comfort!

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  2. Silvano Munoz

    Rated 5 out of 5
    Best pack on the market hands dowm

    Silvano Munoz

    This pack far exceeded my expectations in both comfort and performance. I could cary a 60lb load and i never felt the weight on my shoulders!!

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  3. Richard B.

    Rated 5 out of 5
    BOMBPROOF

    Richard B.

    This pack system is the most durable system on the market. Like the title, I feel like it is bombproof and can handle any load or task that you throw at it on the mountain. The 4K bag system is enough for me to go 5 days on the mountain or just run with my standard day mode essentials. The material is heavy duty and strong while also being light enough to not feel drug down. The hip belt once cinched down is stuck in place and doesn’t slide around at all. This pack makes a 70lb load feel like light work and I can easily see how 100lb+ can be loaded on this pack. The pack system when in day mode essentially compacts down to nothing and is super thin and comfortable. Dennis also provides excellent customer service and answers any question you might have! Great product team!

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  4. Silvano munoz

    Rated 5 out of 5
    I love my pack!!!

    Silvano munoz

    Hands down the best product on the market i run the 4k on my multi-day trips. This pack is large enough to accommodate all the gear for my backcountry trips. On my 5 day Washington trip this year i had close to if not more than 100lbs in it and it felt super comfortable it felt closer to 60lbs. The weight did not shift at any point of my pack with my mule deer and gear. And not once did i feel shoulder fatigue. The fact that it is a modular and i can interchange my 2k bag for my local trips saves me the hassle of having multiple pack for different scenarios of hunting

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  5. Chad

    Rated 5 out of 5
    Love my pack!

    Chad

    The pack is awesome, the accessories are great, and the customer service is second to none. Joe even helped me with my pack fitting in person while I was in the area. Thanks guys!

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  6. Mike Devore

    Rated 5 out of 5
    Outstanding pack and service

    Mike Devore (verified owner)

    I recently bought a pack for my wife. I got the female frame, and it did not fit. Dennis invited us down to get her fitted properly. He did an amazing job on making it happen! Amazing customer service! And IA has some of the best people you will ever meet! After getting her fitted, I tried one on. He put 160 lbs on my back. It felt amazing! I was able to walk in an upright position with no discomfort. I honestly don’t think there is another pack like it for carrying heavy weight. It felt like I had 50lbs on my back. I recommend going to a show or scheduling an appointment to try one on yourself. You will be amazed! I own a different pack for myself. It is a “top of the line”. I will be trading my in soon!

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  7. Eric Pero

    Rated 5 out of 5
    Great pack system

    Eric Pero

    I bought this pack to cut weight and have a true dual purpose pack. The weight aspect is amazing on how light this pack is. The carbon fiber frame is very rigid and great for tying off meat. I used it as a day pack 90% of the 6 weeks I spent deer and elk hunting. The conversion from meat hauler to day pack is quick and efficient. The conversion from camp hauler to day pack is just as easy. I hiked in 60# of camp, 3 times about 9 miles 1 way and was amazed by how little muscle soreness I had afterwards. Hauling out my elk was phenomenal, the meat hauler is the most comfortable I have ever used. Being 6’6″ I usually have fitment problems with packs but this one fit great. The rifle sling hook is incredible for glassing with your rifle still on the pack. I had a few questions and received a phone call from Dennis hours after I emailed him. Great pack and great brand.

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  8. Daniel Mokwa

    Rated 5 out of 5
    With me whenever I’m in the woods

    Daniel Mokwa

    I’ve utilized this pack now for 2 years and I’ve gotten to the point of wearing it all year long whenever I’m out. Whether it be Turkey hunting carrying decoys, summer scouting with the pack full of cameras, or rut hunting with my saddle, sticks, and bow. I couldn’t offer me another pack, It’s almost a part of me now. Expecting many more adventures in the years to come with my pack!

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  9. Rodger

    Rated 5 out of 5
    Great bag size for a 5 day hunt

    Rodger

    The 4K is my go to bag size for anything 3-5 maybe even 6 days long (depending on the weather). The simple but spacious design makes organizing gear easy. The robust design is very durable and will be with you for years of hard use.

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  10. Joe Helmuth

    Rated 5 out of 5
    Great pack and customer service!

    Joe Helmuth

    Very comfortable pack. I was having some trouble with fitting the pack when I first purchased it and one of the owners got on FaceTime to help me get it properly fitted. Great customer service and a very well made, comfortable pack.

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  11. Jesse clawson

    Rated 5 out of 5
    Rock solid pack

    Jesse clawson

    This pack is a game changer. Everything from the belt to the frame is made with the intention to be comfortable from the light loads to the heavy one’s if you have had other pack systems you will know. I am a bigger guy and have always had problems with packs that the belt system wouldn’t hold where you want them to. This one tightens easy and stays right where you want it to.

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  12. Nathan Habbyshaw

    Rated 5 out of 5
    Exactly what is advertised

    Nathan Habbyshaw (verified owner)

    Got this pack for its claim of hauling heavy loads really well. It is also supposed to keep the weight on your hips without sliding down on your butt. It does everything promised really well no slipping and carry’s weight great and customer support can’t be beat.

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  13. Wyatt Walker

    Rated 5 out of 5
    Darn good pack

    Wyatt Walker (verified owner)

    Love this pack ever since I got it. Holds the load really well against your body and is very comfortable. Can’t wait to get some more miles with it this spring and fall.

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  14. Johnny

    Rated 5 out of 5
    Finally a pack that doesn't hurt

    Johnny

    Before using the IA4k, I had a mystery ranch metcalf. Everytime I packed an animal out with it, I would get the worst pain in between my shoulder blades. Not with the IA4k! This year I was able to pack out a bear, elk and deer all with this pack and by the time I made it back to the truck, I wasn’t cringing in pain. Do not hesitate to buy! Plus made in America!!!

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  15. Brandon W

    Rated 5 out of 5

    Brandon W

    This is the most thought out and complete system on the market! With the ability to go big at 6500ci and in less than 2 minutes I’m in day mode at 850ci, then I can be at an additional 2500ci in my load carrier faster than you can say “great shot”!! With a 1.5 liter Platypus bladder that fits perfectly in the lid there is never any squishing my bladder while carrying a load! F#%=ing Brilliant…..just saying!
    AKA- Pack Whore

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  16. Alex Stone

    Rated 5 out of 5

    Alex Stone (verified owner)

    Awesome pack!! Comfortable, durable, and lightweight! Best pack I’ve ever owned, hands down

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  17. Darren Dean

    Rated 5 out of 5
    Amazing pack

    Darren Dean

    I have used most of the top brand packs on the market and This pack is by far my favorite. I’ll as someone who has suffered a burst fracture of the L1 vertebrae, having a good pack is critical to me being able to hunt. I have run this pack for three seasons now and have logged well over 100 miles in it without issues. The little details make a big difference. Simple things like the little lips on the frame that a sling hooks on is something that makes these packs top notch. I have and will continue to recommend these packs to fellow hunters. Last but not least is one of the most important things in my opinion and that is customer service. Initial Ascent customer service is second to none. Every dealing I have had with them has been amazing.

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  18. Chris McKelvy

    Rated 5 out of 5
    Cadillac of pack systems

    Chris McKelvy

    So far my IA pack system has been an invaluable training tool and one of my favorite pieces of gear when I am actually able to get out hunting. I’ve carried up to about 100lbs more comfortable that I would have thought possible. My training weights consist of steel plates, various sand bags and my 4 year old son. So I’ve carried different shapes, sizes and even wiggly loads with not a single hot spot or issue. I’ve hunted with the pack in 4K/Lid and Pannier/Lid configurations and aside from some of my gear being less than size efficient and my “need” to over pack for almost all occasions they are both awesome setups. A person with more minimalist taste or more ultralight gear could probably get a weekend hunt out of the Pannier/Lid without a problem.

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  19. Charles Schubarth

    Rated 5 out of 5

    Charles Schubarth

    Initial Ascent gear is rock solid! Looking forward to using this for years to come!

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  20. Larry Hultman

    Rated 5 out of 5

    Larry Hultman

    I’ve used this pack for two years now, doing everything from back country bulls to flyfishing 5 miles back in the wilderness for a few nights. It holds what I need and can pack out a lot of meat. 4 bulls in two years and my son and I packed em out one trip each. Easy to reach side compartments,and the frame itself is a dream. Once you get it buckled and tight the load doesn’t move. I Love this pack !

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  21. James Hansen

    Rated 5 out of 5

    James Hansen (verified owner)

    Love this pack. Super comfy. Haven’t quit put it through all the paces yet, but so far so good. More important to me is there customer service. Anytime I have had a question or concern about anything from any of there gear to shipping they have responded. And quickly too. I have never had to wait with. Keep up the great work

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  22. Jason Cagle

    Rated 4 out of 5

    Jason Cagle

    Why don’t you do some in sitka colors like sub alpine opticade firstlite colors or somthing

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    • Dennis Stokes

      Dennis Stokes

      Thanks for the feedback Jason. We are constantly working on different options for our packs. We are looking at several camo options and trying to decide if that is a road we should go down. Thanks!

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  23. Zach Diaz

    Rated 5 out of 5

    Zach Diaz

    These packs are where it’s at I’ve had my IAK4 for a few months and have put many miles on it. I love how diverse the pack is, and how I was able to adjusted it to fit my long torso.
    The dudes at IA provide great customer service and really go the extra mile for you literally you cannot go wrong with Initial Ascent.

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  24. TDouthit

    Rated 5 out of 5

    TDouthit

    I love this pack. Plenty of space for your backcountry bivy hunt, easily broken down for your daily hunts and it’s attached to this best pack frame I’ve ever used. This unit was a vital part of packing in a camp and packing out 2 big bulls and 2 mule deer bucks. Dennis and Joe have placed countless hours in the trial of these packs and it paid off for me this year. The details of the bag are listed above and I’d challenge anybody to find a better bag on the market (to include customer service). Not only is this my go to hunting bag but if I were to deploy again it would go with me. This is a first class hunting pak system, backed by first class customer service.

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  25. Jeff M

    Rated 5 out of 5

    Jeff M

    I’ve used the IA4K for over a year now, and this pack system has satisfied nearly all of the needs I want in a pack. The versatility and comfort are unmatched. The features are very well thought out, and really provide a user friendly pack solution. Likely my favorite feature is integrated gun strap notch in the frame. It doesn’t sound like much, but it eliminates the distraction caused by wrestling with your gun sling while hiking. I also really like the water storage in the lid, the external tripod and spotter pockets, and the adjustment versatility. All in all, this is the one of the best designed packs on the market. And, at a little over 5 pounds for the whole kit, you are not sacrificing weight for functionality.

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  26. Steven E

    Rated 5 out of 5

    Steven E

    This pack is amazing. I’ve tried several packs on the market, with each one having its ups and downs, but this pack changed everything for me. It is comfortable, light weight, and extremely versatile. These packs have changed the way I hunt and hike forever. If you haven’t tried one of these packs you don’t know what your missing.

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  27. James MacArthur

    Rated 5 out of 5
    Perfect

    James MacArthur (verified owner)

    I recently made the change to IA from another high end pack, and I am glad that I did. The IA4K system is absolutely amazing, the pack just “sticks” meaning it does not move once it is set. It does not matter how heavy the load, it stays in place. Another major win, is this pack feels the same with 20lbs on your back as with 90lbs. I am serious, it is mind blowing how light a heavy load feels with an IA. I could not recommend IA more to anyone looking for a high performing pack system!!!!

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