I suggest to make an opportunity to choose arms for " speznaz group " between AK and AKSU.
In fact the choice of the weapon depends on the fighting task for " speznaz group ".
They it can choose elite armies
Rus web page AKSU
Truncated automatic device AKS-74U has been developed in the end of 1970 on the basis of regular automatic device AK-74 (in updating AKS - 74 with a harmonious butt) specially for arms of crews of fighting machines, calculations of instruments and other army personnel for which regular automatic device AKS - 74 is too great. Except for army, AKS - 74 U it is widely used in the Ministry of Internal Affairs as it is convenient at moving to the car. For the same reason, and also because it is easy for hiding in a bag or under clothes, AKS - 74 U it is popular among various protection services of the high-ranking state persons, and also among gangsters. Specially variant AKS has been developed for forces and divisions of special purpose AKS -74 UB at which regular; the nozzle is replaced by a groove for fastening the muffler, and under the automatic device grenade cup discharge BS - 1 can be mounted special 30 mm. A number of updatings can have a lateral rod for fastening night and day time sights.
Soldiers from 22 separate brigades of special troops Afghanistan.
Rus web page -- Gallery
On AKM and AK-74 installation of the muffler of a sound of shot PBS-1 is possible, this weapon can be used for special operations