Note: this is based off the Halo 1, 2, 3 needler designs and not the new recent halo reach version. personally I feel they made all the older covenant weapons flat in a way.
I personally think this thing looks ferocious.
I hope you like this needler as much as I did.
When I finally can bring my self to take this apart I will put up a guide.
Guide is here: https://www.instructables.com/id/Knex-Halo-Needler-guide/