Maschinenkarabiner 42 (Mkb 42W), Germany. Prototype for an assault rifle, developed by Walther. <br>Attached at the muzzle is a <i>Schießbecher</i>, a device to fire rifle grenades
<a href="//commons.wikimedia.org/wiki/User:Atirador" title="User:Atirador">Franco Atirador</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>