Stone Glacier Sky Archer 6400 + Krux Frame

Ultralight Expedition Pack for Backcountry Hunting

The Stone Glacier Sky Archer 6400 + Krux Frame is built for hunters who need high-capacity load hauling, minimalist design, and quick-access organization in the backcountry. Designed for extended backpack hunts, bivy trips, and heavy packouts, this expedition-sized pack balances ultralight performance with serious hauling capability.

High-Capacity Storage with Bow-Friendly Access

The Sky Archer 6400 combines a 5,900 cubic inch main bag with the included 500 cubic inch Sky Lid for 6,400 cubic inches of total volume. A strategically placed 26” side zipper allows full-height internal access while keeping your bow secured to the front of the pack, making it easier to reach gear without disrupting your setup.

Load Shelf Expansion and Bivy Mode Versatility

The expandable Load Shelf adds more than 2,500 cubic inches of hauling space and keeps heavy loads close to your back for comfort and efficiency. In Bivy Mode, the top compression strap system and integrated storm flap convert the pack into a 4,200 cubic inch day tripper or quick overnight pack.

Key Features:

• Expedition-sized hunting pack built on the Krux Frame

• Designed for ultralight backpack hunting and heavy packouts

• 6,400 cubic inches of total volume with included Sky Lid

• 5,900 cubic inch main bag

• 500 cubic inch Sky Lid included

• 4,200 cubic inch Bivy Mode for day hunts or quick overnight trips

• 150+ pound load rating

• Expandable Load Shelf adds 2,500+ cubic inches of hauling space

• 26” side zipper provides easy internal access while bow is strapped to pack

• Left-side external access spotting scope pocket

• Internal spotting scope pocket with external zippered access

• 8” zippered stow pocket for quick-access essentials

• 14” side stretch pocket for tripod, water bottle, or extra layers

• Hydration compatible with Hydro Sleeve, sold separately

• Internal ¾” tri-slide buckles for Swing Out Pockets and Camp Pockets

• Heavy-duty YKK #10 zipper

• YKK Aquaguard zippers

• Cordura 500 and Xpac fabric construction

• Heavy-duty 1” Duraflex military-approved buckles and webbing

• Made in the USA

• Weight on Krux Frame with medium belt: 5 lbs. 2.8 oz.

• Bag only weight: 2 lbs. 6.8 oz.

Waist Belt Sizes

Style No. 50153

Summary

The Stone Glacier Sky Archer 6400 + Krux Frame is a field-tested expedition hunting pack built for long backcountry trips, heavy loads, and efficient access in the field. With 6,400 cubic inches of total capacity, a 150+ pound load rating, expandable Load Shelf, bow-friendly side zipper access, spotting scope storage, Bivy Mode, durable Cordura 500 and Xpac construction, and USA-made quality, it is ready for extended hunts and serious packouts.

• Xcurve Frame
• Krux Frame
• Belt Size
• Technology

• The revolutionary Xcurve Frame combines pack frame comfort and lightweight durability like never before. The anatomically matched curvature of the frame conforms to your lower-back and torso for unmatched load-bearing comfort.

  Using 4 carbon fiber composite stays in an "X" configuration, the Xcurve incorporates curvature to match the lumbar and upper back contours for increased weight distribution and comfort under heavy load. The unique "X" stay configuration increases both vertical frame strength and eliminates any lateral shift, especially for loads over 100 pounds.

  The Powerlock hip belt has forward assist pull with locking features to eliminate any webbing slip, even under the heaviest of loads. The tighter the belt is adjusted, the tighter the lock on the webbing. The Powerlock hip belt also has adjustable upper and lower tensioners to cup the hips and equalize pressure for the full width of the belt, regardless of body shape. Dual-density foam and improved belt shape all combine for more comfort under heavy loads.

  The Xcurve shoulder straps offer increased foam density for comfort, increased vertical torso adjustment for shorter torsos, and increased width adjustment to better match the curvature over the shoulders. The Xcurve is compatible with all past and present SG bags and uses the same load shelf features and function that defines all Stone Glacier packs.

  The Xcurve was designed to provide the utmost comfort and stability under the heaviest of loads, a perfect blend of lightweight design and heavy load hauler. Xcurve frame weighs 3 lbs. with Medium Belt.

  
  

• The Krux Frame sets a new standard in ultralight design while maintaining the load-hauling comfort and durability Stone Glacier packs are known for. We’ve taken our proven platform and created a new frame that excels in the mountains in the lightest weight frame we’ve ever built.

  A Load-Shelf is integrated into all of our frames, allowing the user to expand the bag off the frame to pack gear or meat in between the bag and the frame. This eliminates the need to put meat inside the bag and keeps the heaviest of loads more stable and closer to your back for increased comfort.

  
  

• WAIST BELT SIZES

  Small 28" - 30"

  Medium 31"- 36"

  Large 37" +>

  
  

• A Load-Shelf is integrated into all of our frames, allowing the user to expand the bag off the frame to pack gear or meat in between the bag and the frame. This eliminates the need to put meat inside the bag and keeps the heaviest of loads more stable and closer to your back for increased comfort.

  SELECTING A BELT SIZE

  Belt sizes align with average pant waist sizes. If you are on the break between sizes, we suggest ordering the larger of the two sizes. All belts will fit larger waist sizes, but not smaller than the advertised range. Below is our waist belt sizing chart for reference:

  WAIST BELT SIZES

  Small 28" - 30"

  Medium 31"- 36"

  Large 37" +>

  INTERCHANGEABLE BAGS AND FRAMES

  All past and current Stone Glacier bags and frames are interchangeable. This allows you to swap bags on and off your frame for different hunts you may have without requiring the purchase of a whole new bag and frame system. Many Stone Glacier customers own one frame with a smaller day bag, and a larger expedition-sized bag to have a system for day hunts and backpack hunts. When viewing our packs on the website, you will notice a "bag only" purchase option if this is something you are considering.

  MATERIALS

  The overall goal was to build a durable load carrying pack, an ultralight pack without using ultralight materials. Stone Glacier packs are constructed of 500 denier Cordura fabric, X-Pac textiles and heavy duty webbing and buckles. X-Pac is a waterproof, USA manufactured fabric technology that has a tear strength double the military requirements for Cordura 500d and is used in the high stress, high wear areas. Cordura 500d is utilized for the main bag due to its balance of strength, flexibility, and noise reduction. The thread is a heavy duty, military grade UV resistant #92 thread. Buckles are Duraflex Berry Compliant heavy-duty military hardware. In every aspect, the most durable, technical, heavy duty materials were selected.

  LOAD-RATING

  We spent over 3 years of design and field testing with loads from 70 to 150 pounds without any structural issues to accomplish our goal. Here's how we tried to break the frame...Starting with 1-inch steel plates 13” by 25”, we worked our way up to four plates in the pack. Each plate weighed about 85 pounds, 40 pounds per square foot. When it was time to add the third and fourth plate, we welded the plates together, lifted them with a crane, wrapped the Solo 3300 around the plates, and set it back down on the edge of the welding bench where we could get it on our back. The final load weight was 340 pounds with no damage, failure, or signs of stress. While the goal of testing to failure was not accomplished, the load test did prove the 150 pound plus load rating structurally conservative.

  FRAME SUSPENSION

  Nitrogen infused foam, X-Pac fabric, Cordura 500d fabric and industrial hook and loop combine to provide a suspension with infinite adjustment and comfort. Using hook and loop for the shoulder harness attachment allows the user to not only dial in the exact height of the harness but change the angle each shoulder strap leaves the frame. This industrial hook and loop is rated at 17 pounds per square inch, 25% greater than standard velcro. Each shoulder strap has 24 square inches of contact, for a shear strength of 408 pounds per shoulder strap equalling over 800 pounds shear strength for both shoulder straps. The ultimate in adjustability and strength. The unique "X", carbon and titanium composite, four stay design transfers load evenly to the hip belt while offering optimum load lifter angles. The load is supported by 12 connection points to the frame via 1" webbing. Our frame systems have revolutionized the standard of pack frame comfort and fitting ability.

  HYDRATION

  All Stone Glacier packs have two ¾” tri-slides to hang our Hydro Sleeve on the inside back panel. The Hydro Sleeve can hold up to a 3-liter water bladder. Once the Hydro Sleeve is installed, simply insert your water bladder into the Hydro sleeve and run the hose out the top. Hydration hoses can then be run through the hydration port found at the top of all Stone Glacier bags and routed down either the left or right shoulder strap.

  MADE IN THE USA

  All Stone Glacier packs and accessories are proudly made in the USA. Not only do we manufacture our products in the United States but where applicable we also use materials and components that are Made in the USA. Our Head Quarters shop is located in Bozeman, MT where all Stone Glacier products are assembled, inspected, packaged and shipped by Stone Glacier employees.