You are lying. You have not once mentioned the 1986 act. And before you get all caught up in wording the ATF uses the word machine gun for automatics.
FEDERAL MACHINE GUN LAWS ALLOW POSSESSION OF PRE-1986 MODELS
The federal government first acted to regulate machine guns with the National Firearms Act of 1934. This law imposed a special tax on machine guns that was designed to curtail their sale and possession, and also required registration of machine guns. Later, Congress enacted a stricter law—The Firearm Owners’ Protection Act of 1986—banning the possession and transfer of new machine guns. However, this law exempts machine guns manufactured prior to May 19, 1986, as well as machine guns possessed by or manufactured for governmental entities.
Machine guns, trigger activators, and bump stocks can cause destruction. The government does not regulate all military-grade firearms.
giffords.org
The G36 was not designed until the early 1990s. You are lying. If you have one it is illegal. If your friend has one, it is illegal. You wouldn't be able to get the tax stamp.