I'm sure this will get moved into the class 3 section, but here a few answers
You can buy a full auto, takes 6 months of paperwork and $200 tax stamp
You can only own full auto weapons registered before 1984 or so, which limits supply
You will have to pay $5,000 MORE than for the semi-auto version at minimum
Most full auto weapons go for 10k and up
I used to love being able to hit hard at 1000 yards. As I get older I find hitting a mini ram at 200 yards with the 22 oddly more satisfying.