if you havent got one, a lower reciever block. http://www.brownells.com/.aspx/pid=25011/Product/AR-15-M16-LOWER-RECEIVER-VISE-BLOCK
its a great tool and if your planning on doing your own work as it sounds its a great investment. reduces frustration a lot and eliminates the chance of warping the reciever.
one other thing what magpul thing are you talking about?? if its a collapsable stock you wont need to remove the extension tube. the one that comes with the complete lower is just as good as the vltor tube i put on my wife's dpms. if your putting on a stock that requires a rifle length tube your going to want to get a stripped lower instead since your going to be replacing a lot of parts if your going that way.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent
Last edited by JonM; 07-16-2012 at 08:32 PM.