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"There is a variety of traditional carving styles on them. They're beautiful firearms with really intricate carvings on the butt," he said.
He said they would be made available by the trust through outlets such as local gun shops or by people making direct contact with the Pukehinahina Charitable Trust.
"Some of them have been purchased by local people involved with the community, but some are still available."
He said the opportunity to purchase the muskets would be a one-off.
"No more will ever be made," he said.
Pukehinahina Charitable Trust project director Buddy Mikaere said they had been carved to the original design used by Maori warriors at the time.
"They were the preferred weapon for Maori at the Battle of Gate Pa," he said.
He said members of the community would be able to have a "genuine piece of memorabilia" from the 2014 Battle of Gate Pa commemorations.
They had already sold about six to members of the community.
Each Tupara Shotgun would cost $3000, he said.
The walnut butts were carved by master carvers Whare Thompson and Damien Kohu.
The firearms have been disarmed but could be armed by a firearms expert.
For more information and details of where to purchase a Tupara shotgun, go to: www.battleofgatepa.com/shotguns-for-sale.