They may not be standard issue but I am pretty sure I have seen them demonstrated shooting through a standard cement block wall. The whole issue was cheap easy to carry lot of rounds but sufficient destructive power to do the job. Remember how cheap drones were until we started making them?
Then look on YouTube to see some modified 22 rifles firing Full Auto.
I don't think there is a single auto loader that can't be made full auto, in fact troops used to be shown how to modify the M1 Carbine to full auto, at least I certainly was. Life sucks when they keep changing stuff.
The Generals resisted the lever action rifle originally because the troops could burn through their ammunition too quickly. Notice they modified the current rifles to have a three round burst mode.
Notice in almost every cop show on TV the bad guy has ARs or AKs running full auto hitting nothing, then along comes the cop with a Glock or Sig taking them out. A typical fire fight in a cop show has the bad guys burning off a couple cases of ammo, sometime without reloading. Until the bad ass female, usually a 105 pound girl comes out and downs most of the machine gunners with single hand gun shots, then takes out a couple 240 pound 6 ft bad guys with her amazing hand to hand combat skills. Now there is reality for you, ask any kid.
I probably shouldn’t have said ‘none’. You know how many times I am right when I post ‘none’?
None.
Aw hell. Did it again.