An AR-15 type rifle placed in a wall mount in Nevada Highway Patrol Southern Command's HQ. The AR-15 is to be used in the event of an active shooter in the building.
<a href="//commons.wikimedia.org/wiki/User:Noah_Wulf" title="User:Noah Wulf">Noah Wulf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>