AKMN (AKMSN) – Night scope rail (Scope rail and folding stock) AKML (AKMSL) – Slotted flash suppressor (Flash suppressor and folding stock)[10] RPK – Hand-held machine gun version with longer barrel and bipod. The variants – RPKS, RPKN (RPKSN), RPKL (RPKSL) – mirror AKM variants. The "S" variants have a side-folding wooden stock.