Yeah, my question is whether doofusboy could get it done in 3 minutes? To conceal an ARmalite system in a backpack would require an M4 sized setup with collapseable butt. Then the upper would have to be off the lower to keep the whole thing inside 20 inches or so. Getting the two pins in quickly is a skill set all by itself. And in this case he’s dealing with a DPMS setup. That stuff is notoriously sloppy and non-milspec. Been there. had it all. and still have most of it.
gisd O