I am really shock on what others opined that once you have a select-fire option, you tend to be trigger happy, similar argument as when a private citizen will have a gun, that person will tend to shoot everyone you see in the street and then shoot himself/herself, the anti-gun media really works!
It has been tested in another forum by qualified persons who know bullet effectiveness from the medical standpoint that even the lowly 9mm 124gr +P Gold Dot ammo creates 10X bigger wound than a 4.6mm bullet. As pointed out, the 4.6mm weapon system's objective is to have a controllable firearm in full-auto fire, that is, hit probability by a meager trained individual will hopefully increased. Therefore, the effectiveness handicap may be augmented by multiple hits by the smaller projectile. Putting the MP7 weapon system on semi-auto only configuration is the wrong direction
The core of the my statement is that if incapacitation of the suspect is the issue, we should go to the tried and tested ammo both in the lab and in the field.
I will stick to my suggestion of just arming them with P2000 .40 loaded with an effective brand of ammo, and possibly, a shotgun (besides the usual buckshot, a beanbag less-lethal can also be included). Same proficiency can be attained at a lower price.