I'm pretty sure the 1970's Colt AR-15's allowed the "drop in auto sear" to just -- well, how do I put this-- DROP IN.
Later Colt started making AR receivers with solid metal where that cavity used to be. They also changed some other aspects of their lowers, to make it harder to use M16 replacement fire control parts.
Some other manufacturers of AR pattern lowers didn't, and I seem to recall such receivers being pretty popular years ago, even though they were post-1986 and certainly not legal to use as a basis for an M16 conversion.
The thing is, if a "DIAS" that was made in the 1970s or prior to a certain date in 1981 are legal to own, unregistered, but illegal to USE as a conversion part... are lighting links treated the same? Why not?
Later Colt started making AR receivers with solid metal where that cavity used to be. They also changed some other aspects of their lowers, to make it harder to use M16 replacement fire control parts.
Some other manufacturers of AR pattern lowers didn't, and I seem to recall such receivers being pretty popular years ago, even though they were post-1986 and certainly not legal to use as a basis for an M16 conversion.
The thing is, if a "DIAS" that was made in the 1970s or prior to a certain date in 1981 are legal to own, unregistered, but illegal to USE as a conversion part... are lighting links treated the same? Why not?