What a crazy coincidence. This is the first time I've logged into MDS for months and I see a pm about today. I miss another. The real strange thing is that I actually spent today doing the same thing: blasting, parking and assembling a 80% receiver SBR build that's been sitting in a tray since before Xmas. I'm going to post a thread about it in the nfa section right after this... That will have more pics and details if anyone is interested.