I though y'all might appreciate this.
http://www.ar15.com/content/swat/keepitrunning.pdf (http://www.ar15.com/content/swat/keepitrunning.pdf)
There's lots of good operation info on arfcom.
And I just found 2 quarts of PLS and 2 of those squirt bottles of LSA in the old cabinet in the shed!
PLS used to work fine for breaking in M60's. I guess I'll try it on that new AR. Probably won't use quite as much though.
I've never lived in a dry dusty climate (unless you call Del Rio, TX dry and dusty) so I've never had an issue with "too much lube".