Things to look for when buying an AR-15

[Ar180shooter]

From PAFOA, really interesting thread about things to look for or avoid when buying an AR-15

http://forum.pafoa.org/rifles-42/82362-things-look-when-buying-ar.html

The following chart also contains a lot of valuable information

http://spreadsheets.google.com/ccc?key=pwswheghNQsEuEhjFwPrgTA