Not sure exactly what type of info you are looking for...
Roll mark info & placement, or physical / dimensional specs for an M16 lower receiver?
Dimensional specs (blueprint images) can be found through a little work searching the Internet. (sharing them here is kind of a no-no so please don't ask)
As far as roll mark info & placement goes, I'm sure there are a number of members here that can chime-in depending of which manufacturer's info it is that you may be looking for...
Hope this helps...
FlDiveCop71