scout

A M16 is a military weapon that can't be purchased legally by any civilian across the counter, with or without the ban in place. The AR15 is the civilian version of the M16 and the AR15 does not come with any option other than semi-automatic. There is no three shot burst or automatic option available on any weapon that is sold to civilians whether it is labeled an assault weapon or not, period. The assualt weapons ban affected the AR15 model, not the M16 model of this weapon.

Also to be noted is while there is little difference between the diameter of a .22 and a .223, there is quite a difference in the weight of the projectile. This translates into more inertia down range.