Their Maori song is about their great-great-great grandfather, Te Aho Aho, who died fighting in the Battle of Gate Pa in Tauranga in 1845.
"It follows the story - not only the lyrics but the music. It starts off really punchy like gunfire and that's the British bombarding the gates with artillery, it was the heaviest artillery bombardment that happened in the Northern War, they pretty much fired for a whole 24 hours and rushed in and the song goes into a quiet bit and it flows with what happens in the story," said Henry.
Alien Weaponry Live at the Powerstation:
The boys first performed the song when opening for Shihad at the Powerstation in May. They say it is the best song they've written but admitted people were a little confused at first.
"People were like 'what are they doing' then we started singing Maori and everyone was like 'is that a Maori song?'," said Lewis.
The brothers said Te Wiki o te reo Maori and Maori culture were "really important".
"A lot of people don't appreciate the fact it's a big part of New Zealand culture. A lot who don't speak Maori and who don't have a lot to do with Maori people and Maori culture don't realise how much of an effect it has on what we do today."
Maori Language Week continues until Sunday.