There is a gunshop near me that hosts an annual gun show where you can shoot any number of machine guns. Usually 4 guns, 120 rounds = $60 US. or you can choose to shoot a single mg with more ammo as long as you are willing to pay. For example, I think the M249 SAW(100 rounds) was $50, etc. They have Cold War era weapons, WW2 weapons, modern weapons, etc.
There are a number of these all over. Google Knob Creek Machine Gun Shoot.
Here are some of the different full auto wepons at their location.
So far, the full auto firearms that I have fired (at that location):
1. Russian PPSH
2. German MP40
3. US M3 Grease gun
4. UZI
5. Thompson Submachine Gun
6. AK47
7. AK47U
8. AK74
9. M4
10. M16
11. M1919 .30 cal Browning MG
You can see some videos in these posts:
Customer Appreciation
Customer Appreciation 2
Midwest Meetup
WW2 Submachine Guns
“Never give in, never give in, never; never; never; never – in nothing, great or small, large or petty – never give in except to convictions of honor and good sense” — Winston Churchill, Oct 29, 1941