Esstac 556 KYWI (Kydex Wedge Insert)

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(264 reviews)
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Esstac 556 KYWI (pronounced "kiwi")
Comes with velco for both sides.

by Sean
Esstac Shingle Mag Pouch with KYWI - I like that these mag pouches bridge the gap between hard plastic and soft/ cloth mag pouches. The retention is perfect. I prefer open top mag pouches to any other type because when you need more ammo you REALLY need more ammo. Fumbling with a velcro flap or even a bungee can be out of the question for the first 4 mags at a minimum. View More SKD Staff Picks

Don't Like bungee topped magazine pouches? Prefer an open topped pouch for rapid magazine changes? Then these new user-installed Kydex upgrades for the Esstac Wedge magazine pouches and Boar series chest rigs are for you.

The Esstac KYWI (Kydex Wedge Insert) allows you to have the option of swapping out all your existing Esstac bungee retention inserts with a quick open topped friction retention design, or swap out just a few for quicker access while leaving the rest of the mags with the added security of the bungee topped inserts. Magazines in the Kydex have enough compression against them to hold the magazines in place even when the pouch is upside down yet with a quick pull on the magazine they release for speedy deployment.

The spring loaded nature of these Kydex inserts keep the mouth of the Magazine pocket fully open for ease of magazine reinsertion yet hold the mags tight under compression. The apex of the KYWI that contacts the magazine sits above the Mag catch bump when the magazine is in place, so the mags "click" into place.

They are compatible with Pmags, USGI, Orilite, Thermold and Lancer magazines as well as most other 5.56 AR-15/M4/M16 type magazines. Aluminum and steel magazines may need sharp edges chamfered to alleviate excessive wear to the Kydex.


Will these 5.56 KYWI inserts work in other manufacturers equipment? The honest truth we have no idea. We have been told by customers that our 5.56 KYWI inserts work in other manufacturers equipment but we can't tell you which ones they do and don't work in. We do not buy other gear company's equipment and test our inserts in them so we can't tell you what they are going to work or not work in. If you decide to buy our 5.56 KYWI insert to use in a different manufacturers equipment that is your choice.


  • 4
    Kydex wedge inserts

    Posted by Joe w. on 14th Apr 2023

    Awesome product, arrived with no shipping damage. Also a pretty reasonable price for a great product.

  • 5
    Esstac 5.56 KYWI insert.

    Posted by Steve on 8th Dec 2022

    Outstanding. Used 4 of these on my Mayflower chest rig to replace the bungee retainers. These work great and retain the magazines perfectly. No more bungees crowding the mag pouch opening. Makes swapping out magazines much faster and easier. I thought I’d have to sew loop Velcro in the pouches to keep the inserts from pulling out with the mags but so far they stay put 100% by gripping the Cordura.

  • 5
    kydex wedge insert for 5.56 rifle mag

    Posted by Christopher on 11th Apr 2022

    These worked great. nice fit.

  • 5
    Good inserts

    Posted by Austin Howard on 11th Apr 2022

    These fit perfectly in a JPC 1.0 kangaroo pouch.

  • 5
    Easy to use, faster than bungee straps

    Posted by Tran on 20th Dec 2021

    Instead of pulling a strap to the side to take a mag out of a mag pouch, these inserts assist in only pulling out a mag and just as easily put it back in. Therefore there is no need for a dump pouch, just put the mag back in the pouch to save for later. They also keep the shape of the mag pouch which helps in inserting mags.

  • 5

    Posted by Benjamin Braasch on 3rd Dec 2021

    This was my second order as I needed more and these are what I recommend using in all my buddy’s kits. It’s a solid buy and adds just the right retention to soft pouches if you don’t run covers or straps.

  • 5
    Kydex wedge

    Posted by George C on 4th Oct 2021

    Works as advertised I’ve used it for almost 10 years on all brands of magazines even AKs

  • 5
    Great magazine sleeves

    Posted by Michael on 3rd Aug 2021

    I acquired a vest to utilize by my unit. The vest has 3 magazine pouches built into the chest. These inserts slide into place and opened up the channel for the magazines to slide in with ease. They stay secure and I have used them for two 8 hour training days. This was a perfect find for me and my issued equipment.

  • 5
    Kydex sheath

    Posted by Charlie Haskell on 23rd Jul 2021

    Absolutely perfect ..wrap a little velcro around top edges to close them up a need to buy anything else..great job SKD as always