For those that haven't yet assembled an AR15/M4/M16 lower then here is a great video for just that task. There are some tools needed, but nothing to major. You can find the tools needed usually in your tool box or junk drawer. If not those that will be needed are fairly inexpensive. Enjoy !! Video: http://www.wonderhowto.com/how-to/video/how-to-build-a-stripped-ar-15-rifle-lower-assembly-255593/ P.S. Maybe this should be stickie if the mods see fit.