Ok, so this wont be for a while, I turn 21 in April and I have several other projects planned in between now and that time. My question is, if I save up, like a good little boy, for a 10.5 upper and suppressor, can I swap that out on my current AR lower? If I remember correctly that is not legal, am I right? Only reason I ask, was that if I could save up and get those 2 parts, it would mean I wouldn't have to buy the whole thing at one sitting, but the more I thought about it the more I seemed to remember it was a no no to mommy and daddy in the big house...