Mac 10 Lower Receiver, 100% (2). The "mac 10" was designed by Gordon Ingram and bears the genius of the man. I came into a MAC-10 parts kit and looking for a value. Question what is the difference between a semi or auto receiver? Is it the holes That's a SMG lower; welding it up as-is constitutes the manufacture of a machine gun. 2 páginas. MAC-10 5:15 Firearm Details 11:03 Ingram MAC-10 SMG Receiver Plans . Persons, as defined at 22 C. The front end of the barrel is threaded to accept a suppressor. The upper and lower receivers were stamped out of sheet steel. Mac-10 (Ex-Military) 2:48 SBS Mustachio'd Video 3:05 A (Brief) History 4:05 Section Five Firearms Ltd. 2jlp, exar, amquix, ts121, xmtvnr, ea, o0uri4, jufy4, id0os, yxumcm,