A good multi-purpose AR tool?

[dark_ninja]

I got an Magpul A.S.A.P. for my AR but didn't realize I needed a tool to intsall it. Anyone recommend a good multi-purpose tool and where I can get it?

[AirNavBlue]

http://www.brownells.com/.aspx/sid=58293/pid=31865/sku/eFECT_Tool?utm_medium=shoppingengine&utm_source=googlebase&mc_id=10000&cvsfa=2345&cvsfe=2&cvsfhu=3130303030343837352d3130303030343837352d313136

[sephy]

http://riflegear.com/p-216-dpms-multi-tool.aspx I have this one. Great tool.