Pakistanis had also made a new caliber just by a little changing in original (7.62×39mm) ammo, that is known as 44 bore.[24] Pakistani 5.45mm AKs are sometimes called "Kalakovs".[25] Poland[26] pmK (kbk AK) / pmKS (kbk AKS) (name has changed from pmK – "pistolet maszynowy Kałasznikowa", Kalashnikov SMG to the kbk AK – "karabinek AK", Kalashnikov Carbine in mid-1960s) (AK/AKS); kbkg wz. 1960 (rifle grenade launcher), kbkg wz.