Update 12/16/12: In light of Halo 4's new battle rifle, which has angles and curves this replica doesn't match, I am here to make a note that this was supposed to be based off of halo 2's BR. Due to a recent comment, I have updated the title as well as add this note to reflect the new game's release.
Behold, possibly the best knex Halo Battle Rifle replica ever made in terms of looks.
Unfortunately, it has a few downsides. The mech doesn't work first of all. I have other things I want to do, I've been working on this for over a month now, and I don't want this project to go to pot because it looks so damn good. So here is what I am going to do:
I will post instructions for the gun "As is". If anyone wants to fix it and make it work, be my guest. You can make it single shot, or mag fed, whatever, as long as it works without butchering the look. If anyone does fix it, they should make a video of it shooting, and send me the raw file over Skype (My skype name is dj_jazzy_jeff1, if you aren't already in my contacts, say that you fixed my BR in the introduction message)
If I like your fix, you will then be a collaborator on this instructable, changing all the steps so they build your version. I will give credit to you for fixing the gun, but I must maintain the majority for making the gun look like it does. You will receive a patch and a subscription if you help me.
In the meantime, I'm touting this as a non-firing model with parts of a mechanism in it. Don't call me hypocritical for asking other people to make their replicas shoot, because believe me, I made the effort. Nobody who I have asked didn't even bothered trying.
NOTE: Building your improved version in metallics is optional.
Here's a video of it:
Step 1: The front bit.
This bit holds the bands and whatnot.
1. Make this layer.
2- Layers 2-4 on layer 1.
3- Close up on layer 3. It's built a bit differently near the front.
4-6: Make the front barrel. It's a bit tricky, be careful.
7- Connect the barrel to layer 3.
8- Add this little bit. It makes the assembly sturdier.
9- Make the grip thingy
10- Add it to the rest of the gun
11- Add in another layer 1 and this is what you get. Move onto the next step.