My understanding is that when Curtiss Higgins installs one of his sears in an FNC host, he files an amended Form 4 listing the serial number of the semi host receiver in which he has installed the sear. I do not know if he still does this. But if he does/did, I can only assume that it was at the request of BATF -- why go through the paperwork if BATF has not required that it be done?
Unlike AR15 RDIAS or RLLs, or HK sears in trigger packs, the registered FNC sear does require modifications to the host receiver. Again AFAIK, it is the
only semi receiver which BATF allows to be modified to host an FA sear. We may never know the logic under which BATF made this decision -- but blindly basing a different use, such as installation of an FNC sear in an AR host, upon such unknown logic is foolhardy.
I really, really, really would like BATF to allow xm15e2s' conversion.
But BATF is
not an agency which promotes NFA -- instead, its mission is to
restrict NFA. In any and every case in which we see an expansion of the MG population, BATF instead sees an opportunity to shrink it. That, my friends, is reality.
