Originally Posted By chipdog4:
All you need is a BIG flat blade screwdriver and a wrench to fit the end of the receiver extension.
Thread the buffer tube in by hand and if you can, get it tight by hand, or use a cresent wrench on the flats on the rear.
Then slide the stock over and run the screw in tight.
ETA: But get the armorer's wrench. Lots of convenient tools there.