These weapons were being used by two criminals recently apprehended in Buenos Aires. They are believed to be members of a gang that specializes in home invasions and were arrested after a car chase followed by a gunfight. They were armed with two 9mm Bersa pistols with an extra large double stack magazine and a 7.5” barrel M4 carbine with laser sights. They also had a radio scanner, probably used to scan police frequencies or communicate with accomplices.
It isn’t uncommon to find these kind of professional criminals also wearing body armor or using disguises, dressing up like policemen. They are usually well armed, well trained and very motivated.
For dealing with this kind of organized criminals, you have to be well armed and well trained yourself if you expect to have a chance at all of winning a confrontation.