WTF T.REX ARMS AC1 Back Panel 91 Hydro Camelbak Source

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back panel 91 AC1
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Product Overview

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Whiskey Two Four Hydro Back Panel 91 for T.REX ARMS AC1.  Back Panel 91 is designed for use with Source Kangaroo, WLPS, and ILPS bladder and CamelBak's 70oz and 100oz short bladders.

Back Panel 91's VELCRO® Brand ONE-WRAP® loops allow for hydro and cable routing.  Back Panel 91 for T.REX ARMS AC1 uses a laser cut bikini to slide over the top of the rear plate bag.  The bottom flap is sandwiched with the plate carrier's plate flap.  Adjust the shock cord as necessary to stabilize the hydration bladder or use it to secure a lightweight jacket.

Back Panel 91 uses laser cut ACRONYM (Advanced Composite Rugged Optimized NYlon Material), MIL-DTL-32439 500D nylon, A-A-55126 nylon hook & loop, A-A-59826 bonded nylon thread, YKK USA heavy duty zippers, and well compensated, skilled labor to produce a cost effective part.

WTF's Back Panel 91 is manufacturable.  Whether for direct or dealer sale, this design is realistic for us to keep in stock or near stock with (as close to) on demand cut & sew (as we can get) and replenishing inventory on the fly.  This design represents a balance of durability, ease of assembly, machine operator fatigue reduction, COTS materials use, cost effective cut and sew methods, self jigging/locating design, scalability, and usability.

Back Panel 91 for T.REX ARMS AC1 (size medium) is lightweight at just 3.1oz / 116g.  Made in the USA with Berry and NIR compliant fabrics.

*all T.REX ARMS trademarks, brands, etc are the sole property of T.REX ARMS.  T.REX ARMS does not endorse this product.

*bladder not included*


(4 reviews) Write a Review

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  • 5
    Trex arms AC1 backpanel

    Posted by Charlie Williams on 19th Feb 2024

    Awesome product! Fit perfectly and the M81 camo looks great. I use mine for medical and extra supplies.

  • 5

    Posted by Matt on 24th Jul 2023

    I have L210s, so the back panel has a little slack, but I think it’d fit tighter on thicker plates. Fits my 2L source bladder with room for a rain shell or small garment inside. 10/10 stayed hydrated.

  • 5
    Easy install works great

    Posted by Brock V on 7th Mar 2022

    Works great and looks great.

  • 5
    Awesome hydration pack and awesome service

    Posted by Bowman F on 5th Jan 2022

    I wanted this in multicam Arid or my AC1 and at the time it was not an option on the website. I sent an email asking if a spiritus pack would work instead since that was offered in Arid. I got a reply in 15 minutes and they had already updated the site and added MC Arid as an option for the AC1 pack. I immediately bought it and received it faster than the estimate they gave me. Actually using the pack has been a great experience. It fits my 2.5L hydration pack perfectly and can carry a few snacks if you so desire. I would not be surprised if this outlasts the AC1 since the quality is top notch. I highly recommend WTF to everyone!