Mean Arms EndoMag 9mm Black. 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. Specifications for Mean Arms EndoMag 9mm: Manufacturer: Mean Arms Color: Black Fabric/Material: Polymer Gun Make: AR Platform Glock Gun Model: Glock 17 Caliber: 5.56x45mm NATO 9mm Luger Magazine Capacity: 10 Round Magazine Included: No Condition: New Additional Features: 1 Pack Features of Mean Arms EndoMag 9mm Quickly and easily change calibers from .223/5.56 to a caliber associated with the EndoMag in a Magpul 30-round 5.56x45 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. Package Contents: Mean Arms EndoMag 9mm What firearm models does the manufacturer say Mean Arms EndoMag 9mm is compatible with? The manufacturer suggests that Mean Arms EndoMag 9mm is compatible with Glock 17Mean Arms 2100669: EndoMag 9mm Black