I love all these people who don't READ the OP.
You cannot assemble an UPPER without specialized tools, anyone can do a lower with next to nothing.
You need an action block, vise, and barrel nut wrench to do an upper.
Next up you guys are going to tell him that he can put on a new FSB on a new barrel with a toothpick.
Yes, you need a $50 action block.... or a barrel vise, or a bench vise with smooth-ground jaws, or a barre lvise with padded leathe jaws or a set of aluminum soft-jaws for your canadian tire vise, or... or... or...
If you assemble these regularly, buy the action block. If not, I would not recommend the expense.


















































