first let me say this.
I own several full auto weapons, and have fired alot rounds out of alot more. Mostly AK and mac 10
however unless you are extremely trained to fire an AF weapon, and think you are going to be in a mogadishu (or maybe camden NJ
) like setting where you will be carrying about 200 rounds of spare ammo, you need to think about sticking to the shotgun.
in my opinion the combat uses of a good 12 gauge are alot more vast then a maching gun, not to mention that a full auto weapon is very very very hard to use well.