Agreed, there is no minimum 3 day wait by federal law. That may be a state law where you live, but in Nevada, you take it home as soon as you finish the paperwork. I do have a CCW and all that does for me is it alleviates me from having to go through the "instant" check, which also saves me $15 on every gun purchase. That is the reason I got my CCW. It paid for itself within a couple months.
Oh, and congradulations on the new rifles. I ordered one of Bushmaster's M4 Kits directly from Bushmaster. That means that I paid full retail which was very close to what you paid for a complete rifle. And my kit doesn't include a lower receiver. So, I am putting together a post-ban that is costing as much as a pre-ban (almost). But what the heck, if you work enough over time, it doesn't matter.