Endo Mag 9mm Conversion



We are excited and pleased to introduce the MEAN EndoMag. This product is a magazine insert that converts your Gen 2 or Gen 3 5.56/.223 PMAG housing into a 9mm magazine to use with a standard AR lower and 9mm upper of your choosing with a Glock or Colt variant 9mm BCG.


Here is a list of features the Mean Arms 9mm Magazine Adapter are as follows:

  • Quickly and easily change calibers from .223/5.56 to a caliber associated with the EndoMag in a Magpul 30-round 5.56×45 PMAGs (Gen 2 and 3)
  • Functions as a magazine!
  • No magwell adapter needed!
  • Keep your standard 5.56 Multi Caliber lower receiver!
  • Comes fully assembled.
  • No tools required.
  • Keep all your PMAGs in use, no need to buy additional or specific 9mm magazines.
  • Keep your muscle-memory reload-training the same between calibers! Same magazine, same draw, same feel.
  • No learning curve when reloading because it is the same magazine you already use!
  • Use most of your PMAG accessories: i.e. mag pouches, storage racks, decals, caliber indicators, etc.
  • Not a picky eater. Shoots all 9mm munitions. Hollow points included.


Key Functions

  • No modifications to your 5.56×45 lower!  Changing calibers is now simply a complete 9mm upper for your AR platform. No nuts, no bolts, no drilling, no bull.
  • Last round bolt-hold open feature, just as an AR15 should function.
  • Built-in ejector designed to perform under intense conditions.
  • Convert your 5.56×45 PMAG to 9mm in seconds, and easily convert back to 5.56 without damaging your PMAG. No permanent changes to anything!
  • Specially formulated polymer.


Additional information


Single, 3 Pack

4 reviews for Endo Mag 9mm Conversion

  1. Jason Williams

    The Endo Mag was a game changer! I wanted to build a 9mm but didn’t want to go through the hassle of another wait period and having to build out another lower. Bought a 3 pack of these from Greenwell Armory and they arrived in 2 days! I had slapped new 9mm my upper on my 5.56 lower and swapped the buffer for the spike 9mm buffer and we were ready to rock! The 9mm platform is so much fun to shoot and I had no issues. Put a few hundred rounds through it yesterday. Definitely something to look into. Specifically if you are like me and have a ton of Pmags but don’t own a Glock!

    Check out these Endo Mags, you will not be sorry. Definitely a splash in the industry.

  2. Anonymous (verified owner)


  3. James C. (verified owner)

    Was very easy to install. Works very well with my 9mm upper.

  4. Joe (verified owner)

    Have not tried them yet. Went together easy

Only logged in customers who have purchased this product may leave a review.

Close Menu


[contact-form-7 id=”298″ title=”Contact form”]


Your Cart