A collection of AR-15 stripped lower receivers, the starting point for any AR-15 rifle project.
<p>I have a nasty habit of buying a couple of stripped lowers every time I pick up a gun at a gun store (they have to be registered upon purchase like almost all other firearms here in California, NICS check, ten-day wait, the whole nine yards; don't you feel safer?).  After a short time the lowers start to pile up!  But I guess you can't have too many stripped lowers.
</p><p>The two in the front are of historical interest.  On the right is a Fab-10 with a sealed magwell.  For several years after 2000 these were the only magazine-fed AR-15 lowers legally available in California.  You had to remove the takedown pin and open the receiver to load the rifle.  If there was a jam that prevented the bolt from going fully into battery, you were screwed (well, you had to remove the pivot pin to clear the jam).  That's the main reason I never actually did anything with this lower.
</p>
On the left is something even weirder: a DPMS single shot AR-15 lower.  I bought it when I started my business because I needed an AR-15 lower and aside from the Fab-10 this was all I could get.  There is almost no use for such a lower, though they were often employed to build .50 BMG rifles such as the Ferret50.  I nearly bought one of those before they, too, were banned in California.
Mitch Barrie
CC BY-SA 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/simonov/14599737656/">https://www.flickr.com/photos/simonov/14599737656/</a>