Carbon_15, you cannnot legally convert that MAC to full auto. If you wanted to do that you would have needed to do it before 5/19/86. The suppressor build up is still legal, but new technology has pretty much made the old Sionics design obsolete.
Jason, recreating the ASP can best be done with a gunsmith on a S&W 39-2. The new 3rd gen are better guns, but the grip design will not permit the use of the clear panels as the grip is molded to house the mainspring as well, as is found on a Walter P38 and Walther PPK. If the 2nd gen S&W uses panels and it was available in a chopped and bobbed gun, you would be almost there starting with it.
PigPen, I am not aware of the ASP ever being issued to any govt agency. The Secret Service is a division of the Treasury Dept and protection of the President is one of their duties, others being related primarily to counterfiting operations. You reference 'embassy Secret Service', any protection duties at embassies are handled by State Dept personel, with the exception of Pres and VP visits.