A Classic Army MG36 light machine gun magazine with the stock folded.  See <a href="//commons.wikimedia.org/wiki/File:Airsoft_MG36.JPG" title="File:Airsoft MG36.JPG">Image:Airsoft MG36.JPG</a>.
<a href="//commons.wikimedia.org/wiki/User:BrokenSphere" title="User:BrokenSphere">BrokenSphere</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>