Puoh Geng Gong or Snake Girl or Magic Curse or The Snake King's Wife???

I don't know which of all of these titles is the correct one, but these are some pretty neat posters.

ล้างเผ่าพันธุ์โคตรผีปอบ

ล้างเผ่าพันธุ์โคตรผีปอบ (1990) aka Holocaust of the Ogre Clan

This movie has one of the coolest titles I've ever heard. Unfortunately, it's extremely boring. Here are some screenshots and the beautiful cover art. No, the movie does not contain a giant human eating tarantula nor does it ever feature the male lead holding a rifle and shotgun. Ignoring this one would be my recommendation although I'm sure you will.

-Eddie