Exo Mtn Gear K4 5000
Hunting Pack
~$700

Exo Mtn Gear

Exo Mtn Gear K4 5000

Exo's weeklong workhorse: a 5,010 ci bag (5,658 ci / 93 L with the included lid) on the carbon-stay K4 frame rated past 150 lbs, sold as a complete $700 system. It pairs a roll-top plus horseshoe zip with the deepest stock organization in the flagship class, with four frame heights and five hipbelt sizes built in Boise, Idaho.

Approx. price
~$700
Capacity
93 L
Weight
5.8 lbs
Best For
Week-long backcountry hunters who want dialed fit and real organization without giving up a 150 lb meat hauler
Buy from Exo Mtn Gear

Price and availability on Exo Mtn Gear’s site may differ.

Type
Hunting Pack
Frame Type
External Frame
Capacity
93 L
Weight
5.8 lbs
Max Recommended Load
150+ lbs
Torso Fit
4 frame heights (22–26.5 in) with adjustable harness, 5 hipbelt sizes XS–XL
Material
MIL-SPEC 500D CORDURA with YKK zippers; built in Boise, Idaho
Back Panel
K4 carbon-fiber-stay frame with integrated load compression and flap-style load shelf
Warranty
Lifetime guarantee against defects, plus 30-day trial period
Raincover Included
No
Fits BV500 Bear Canister
Yes

Sizes Available

CapacityPriceWeight
K4 2200 (36 L)
K4 3600 (59 L)
93 Lthis pack$7005.8 lbs
K4 7200 (118 L)

Features

Adjustable TorsoHydration SleeveRemovable LidFits Bear CanisterMeat ShelfRifle & Bow Carry

Pros

  • Rokslide's multi-tester review called the K4 'the most comfortable pack tested' against the industry's best, crediting the custom carbon-stay frame and redesigned harness.
  • Fit options lead the category — four frame heights (22–26.5 in) and five hipbelt sizes (XS–XL), backed by a 30-day trial, versus pick-a-curve guesswork with Stone Glacier's Krux/Xcurve.
  • Organization is the K4's calling card: horseshoe zip into the main bag, stretch front panel, full-length zippered side pockets, and laser-cut MOLLE — owners say it's the easiest flagship pack to live out of.
  • The flap-style load shelf deploys without pulling the bag off the frame, making day-pack-to-meat-hauler transitions faster than Stone Glacier's unbuckle-everything approach.
  • The included lid adds ~650 ci and the price includes the complete system — no a-la-carte lid or frame math like Kifaru builds.
  • A dedicated hydration compartment with a drain grommet keeps a leaky bladder from soaking your sleep insulation, a detail forum users repeatedly call out.
  • Owners rate it 4.9 stars across 529 reviews on Exo's site (98% five-star), and the Boise-based customer service earns Rokslide praise rivaling Mystery Ranch's.
  • Integrated bow and rifle carry work stock, and treadmill-style testing threads report no harness slippage running uphill with 30+ lb loads.

Cons

  • The bag tapers narrow at the bottom — Rokslide users report bulky sleeping bags like a Western Mountaineering Kodiak in its stuff sack fight to fit.
  • Several owners in the long-running K4 thread report harness or hipbelt slippage once loads pass roughly 60 lbs, requiring re-tensioning on pack-outs.
  • Side pockets use a single zipper that interferes with the lid when it's fitted — a two-zip design is a common owner wish.
  • Bow Spider users note the mount's metal clips don't line up with the K4 hipbelt MOLLE spacing, forcing workarounds for a popular accessory.
  • Hipbelt pockets aren't included — the MOLLE belt is bare until you buy Exo's add-on pouches, unlike some competitors' stock belt storage.
  • At 5 lb 13 oz complete with lid, it's the heaviest of the big-three frame systems — about 0.3 lb over a Sky 5900 and half a pound over a Metcalf 75.
  • The lighter K4X update (about 1 lb savings in prototypes) has limited release in summer 2026 with full launch in 2027, so buyers today are getting last-generation materials.
  • Exo sells essentially direct-only, so outside the 30-day trial there's no trying one on in a store the way Scheels stocks Stone Glacier and Mystery Ranch.

Common Questions

Compare the Exo Mtn Gear K4 5000

Kuiu ICON 6 6000
~$699
Hunting Pack

The ICON 6 6000 is Kuiu's 2025 ground-up replacement for the Pro 6000, pairing a 98-liter expedition bag with a patent-pending 3D corrugated thermoplastic carbon frame that yields under stress instead of shattering. The $699 full kit ships with the frame, suspension, two hip belts, a load sling, a rifle quick release and a gear loop strap, and at 6 lb 2.4 oz it remains one of the lightest week-long backcountry haulers sold.

98 L3D Carbon Frame6.15 lbsVentilated back

Weight

6.15 lbs

Capacity

98 L

Frame

External Frame

Also in ICON 6 3500 (57 L) / ICON 6 4500 Divide (74 L) / ICON 6 8200 (134 L)

Best for: Week-long self-supported Western backcountry elk and mule deer hunts
View details
Stone Glacier Col 4800
~$699
Hunting Pack

The Col 4800 is Stone Glacier's feature-rich mid-size bag, a 4,800 ci (79 L) evolution of the best-selling Solo that adds compartmental storage, an internal spotting-scope pocket, and tri-slide accessory attachment points. Sold as a complete system on the Krux or Xcurve carbon-stay frame for $699, it carries 150+ lbs and expands via a 2,500+ ci load shelf for hauling quarters. It targets 3-5 day archery hunts through late-season day hunts with bulky cold-weather gear.

79 L / 150+ lb rating2,500+ ci load shelfMade in USA

Weight

4 lb 7 oz (Krux) / 4 lb 11 oz (Xcurve), complete with medium belt

Capacity

79 L

Frame

External Frame

Best for: Weekend-to-5-day Western hunts where the Solo 3600 is too small and a Sky 5900 is more bag than needed
View details
Stone Glacier Terminus 7000
~$699
Hunting Pack

The Terminus 7000 is Stone Glacier's ultralight expedition pack for sheep and goat hunters: 7,000 cubic inches (115 L including the 500 ci lid) at just 3 lb 15 oz, with the bag sewn directly to a 26-inch carbon-stay frame rated for 150+ lb loads. A 2,200 ci collapsible internal load cell positions boned-out meat against the frame, and the main bag compresses to 4,300 ci in bivy mode for day hunts. The main bag uses SG's waterproof ULTRA fabric, a UHMWPE blend developed with Challenge Sailcloth.

Sub-4 lb, 115 L150+ lb load ratingULTRA/UHMWPE fabric

Weight

3 lb 15 oz

Capacity

115 L

Frame

Internal Frame

Also in Terminus 8700 (143 L)

Best for: Backpack sheep, goat, and fly-in hunters who want maximum expedition volume at absolute minimum weight
View details
Sitka Mountain Hauler 6200
~$690
Hunting Pack

Sitka's flagship backcountry hauler pairs a 6,200 ci bag with a 6061-T6 aircraft-grade aluminum frame that weighs 6.4 lb yet is rated to carry 150 lb. The primary bag expands from 4,000 to 5,000 cubic inches so an elk quarter can be set on the internal load-hauling shelf without re-rigging straps, and every load-bearing component attaches directly to the frame. Harvest-critical components are finished in Sitka orange so they stay findable during a fatigued pack-out.

150 lb load rating at 6.4 lbBag expands 4,000-5,000 ciInternal load-hauling shelf

Weight

6.4 lbs

Capacity

102 L (6,200 ci)

Frame

Internal Frame

Also in Mountain Hauler 2700 (44 L) / Mountain Hauler 4000 (57-74 L)

Best for: Committed western backcountry hunters doing multi-day elk and sheep hunts with heavy meat pack-outs
View details
Stone Glacier Sky 5900
~$725
Hunting Pack

Stone Glacier's do-it-all western pack: a 5,900 ci (96 L with Sky Lid) bag on the curved carbon-stay Xcurve frame, rated past 150 lbs yet 5.5 lbs complete. The $725 system compresses to a 4,300 ci bivy-mode day pack and opens a 2,500 ci load shelf between bag and frame for hauling quarters, with USA-made CORDURA 500/X-Pac construction.

96 L150+ lb RatingBivy Mode

Weight

5.5 lbs

Capacity

96 L

Frame

External Frame

Best for: Weight-counting backcountry elk and sheep hunters who want one pack that day-hunts small and hauls triple-digit loads
View details
Stone Glacier Approach 2800
~$675
Hunting Pack

The Approach 2800 is Stone Glacier's flagship day-hunting bag sold as a $675 complete system on your choice of the Krux or Xcurve full meat-hauling frame (the 1 lb 5 oz bag alone rides on any SG frame). The 2,800 ci (46 L) full-panel-zip bag sits over an expandable 2,500+ ci load shelf with a 150+ lb load rating, so a day hunt can turn into a pack-out without a return trip. It carries a spotting scope up to a 115 mm objective in a dedicated external pocket with a tripod attachment system.

46 L bag on 150+ lb frame2,500 ci load shelfFits 115 mm spotter

Weight

4 lb 1.3 oz complete on Krux (bag only 1 lb 5 oz; 4 lb 5.3 oz on Xcurve)

Capacity

46 L

Frame

External Frame

Best for: Western day hunters who glass hard and want a true meat-hauling frame under a compact bag
View details