I tried to leave this one alone but I just can't. I guess I need to practice better self control :) I have Bill Holme's volumes 4 and 5 on 9mm machine pistols and AR-15/M16's. I also have Keith Anderson's book on military grade suppressors and one of Alan Paulson's book on the subject as well. Besides being a kick ass painter and metal sculptor I am a decent machinist with a decent home shop so making the upgrades you list above is in my opinion quite easy. I'm also of the opinion that if the FBI or AFT or whoever comes to my door whatever weapons I may or may not have and my level of proficiency with them will be irrelevant. I live in the middle of gun-loving MO. I wish it weren't true but an appreciable amount of my income is derived by doing machine work for gun owners. I don't consider myself exceptionally knowledgeable concerning guns, it's just machine work to me. I don't love guns. Sucky work for an artist but I have to pay the bills.
John Thornton