stumbled on a box. Don't even remember buying or acquiring most of these, or what made them significant at the time. Anyone else have a random box of AR receivers like this?
This one *is* particularly special. Not so much for this side...
...but for the reverse. This was a special run of Florida Defensive Carbine Club (or, FDCC) lowers. FDCC is a match run in north Florida that was started maybe 20 years ago, and which I copied, modified, and brought with me to South Florida maybe 15 years ago. While I'm not longer involved in either, "my" match is still running out at Markham Park in Broward County.