Kammala jumla mai zuwa: Asalin makamai masu amfani da barbashi a cikin tsibirin Nusantara za'a iya ganowa daga ƙarshen karni na 13. Ƙungiyar
Harin Mongol na Java ya kawo fasahar gunpowder zuwa Java a cikin hanyar bindiga (Sinanci: "Pao"). Wannan ya haifar da ci gaban Javanese breech-loading swivel gun, da cetbang. A cikin 1300s, rundunar Majapahit ta riga ta fara amfani da su azaman makamin jirgin ruwa. Javanese sun kware a fasahar fasahar tagulla da kuma amfani da makamai na tsakiya wanda yawancin masana'antun gida ke ciyarwa a cikin yankin nan da nan. Takaddun shaida da na archaeological sun nuna cewa 'yan kasuwar Larabawa sun gabatar da barbashi, gonnes, muskets, blunderbusses, da kuma bindigogi ga Javanese, Acehnese, da Batak ta hanyar hanyoyin kasuwanci da aka kafa tun daga farkon zuwa tsakiyar karni na 14.