Marc
Lets try this again , Welcome to GBO and the crazy world of handi-holics . The bad news is , yes they will have your frame and stock the whole time , the good news is most don't take that long , some in as little as 3 weeks .
As for used barrels , you can get all the info for fitting in the FAQ's at the top of the CF page . My last 3 barrels needed no fitting at all . if you can use a can opener or change your own spark plugs you should have enough mech. skill to fit a barrel with the right info.
stimpy