<p>Figure 54 of the US Army Operator's Manual for the AK-47 Assault Rifle.<a class="external autonumber" href="https://en.wikisource.org/wiki/AK-47_Operator%27s_Manual">[1]</a>.
</p><p>The AK-47 can mount a (rarely used) cup-type grenade-launcher that fires standard Soviet RGD-5 hand-grenades. The soup-can shaped launcher is screwed onto to AK-47’s muzzle. To fire… 
</p>
<ul><li>First, insert a standard RGD-5 hand-grenade into the launcher and then remove the safety pin…</li>
<li>Second, insert a special blank cartridge into the rifles chamber…</li>
<li>Third, place the butt-stock of the rifle on the ground and fire from this position.</li></ul>
The maximum effective range is approximately 150 meters.
U.S. Army
<a rel="nofollow" class="external free" href="https://www.ar15.com/content/webPDF/AK47USArmyOperatorManual.pdf">https://www.ar15.com/content/webPDF/AK47USArmyOperatorManual.pdf</a><br><a class="external free" href="https://en.wikisource.org/wiki/File:AK47Figure54.jpg">https://en.wikisource.org/wiki/File:AK47Figure54.jpg</a>