Wow, thank you
. I had trouble finding sites with a lot of examples of Chinese and SE Asian firearms, but you're right, Middle Eastern/Indian ones were a lot more "common"...
I had found a lot of pictures of "camel-guns"(?) and Afghan as well as North African guns? I don't know much abotu the guns themselves, but I do know that in Afghans has guns when they invaded India, and I think the Moroccans had guns when they invaded Mali... obviously this is not where my historical knowledge is strong
#3 gun looks like a gun in the aboriginal collection of Yang-Grevot... Where was it made, do you know? Perhaps the location of origin was close to Taiwan and thus the Aborigines got their hands on some Chinese guns of that type...