A little sheet to give an overview over the different AR-15 models, their length and their generation.
Source: The Black Rifle, M16 Retrospective R. Blake Stevens &amp; Edward C. Ezell Collector Grade Publications Ontario, Kanada 1992
<a href="//commons.wikimedia.org/wiki/User:Grasyl" title="User:Grasyl">Grasyl</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>