I like the collapsible stock since a longer gun can be used for entry/clearing buildings since accuracy is not going to be so important as it is farther out. The farther I reach with it the longer the stock gets. All my AR's have always had collapsible stocks. Just my preference. I don't like guns that are only built for one purpose, I like a gun to be functional for many applications.
"Those who would sacrifice liberty for safety, deserve neither liberty nor safety." ~Thomas Jefferson
"The spirit of resistance to government is so valuable on certain occasions that I wish it to be always kept alive. It will often be exercised when wrong, but better so than not to be exercised at all." ~Thomas Jefferson