The variant of AKMassault rifle with metallic MP40-styled bottom-folding stock. The letter S on "AKMS" stands for Skladnoy (ΡΠΊΠ»Π°Π΄Π½ΠΎΠΉ), Russian word for "folding". This tag does not mean the plural form of AKM. Not to be confused with AKS-74, the AK-74 variant with side-folding triangular skeleton stock.