Yep. In the rain, snow, sleet, amazingly high winds [once cleared out the vaults of 2 banks hit by a Midwestern tornado, TWO tin cans and 3 chase cars on that one] and floods. And more paperwork than your body weight.
I just want the machine guns.
Depending on where you live, there are a lot of ways that are a LOT easier and a whole LOT cheaper. A $30 C&R FFL dealers license lets you deal in *collectable* MGs that are over 50 years old...which includes Thompsons and all WWII MGs and SMGs, the early AR15s and XM16s, the H&K MP5 [1964] and early Gordon Ingram designs and prototypes, including the M6 and M10 [also begun in 1964.]
:)
-/-