Charter Arms AR-7 Explorer Rimfire Rifle - Rifle, automatic. 1988.0587.05.
The <a href="https://en.wikipedia.org/wiki/Smithsonian_Institution" class="extiw" title="w:Smithsonian Institution">Smithsonian Institution</a>
<a rel="nofollow" class="external free" href="https://americanhistory.si.edu/collections/search/object/nmah_1201447">https://americanhistory.si.edu/collections/search/object/nmah_1201447</a>