Introduction: Pineapplebobthegreat's Semi-Auto Halo Assault Rifle

Picture of Pineapplebobthegreat's Semi-Auto Halo Assault Rifle
First of all, thanks to The Jamalam for checking out all of instructables to make sure this gun hadn't been posted yet.

Now, in my slideshow, I said that the concept had been used two times before. By "the concept", I mean the slingshot idea (first created by KillerK). However, I've modified the slingshot idea so that a magazine will fit. It holds 5 bullets and is Semi-auto. With one huge rubberband, it shoots about 5 feet. With two rubberbands, 10 feet. 3 rubberbands, 21 feet. With 4 rubberbands, 34 feet. With five rubberbands, 46 feet. (The rubberband is bigger than a broccoli rubberband, but skinnier as well. If you view the movie on how to the load the gun, you'll see the size of the rubberband. The video called Video of Halo shows you how to load the gun and the rubber band size.

  • Sturdy
  • Pretty realistic
  • Semi-Auto
  • 46 feet
  • Looks pretty sweet (in my opinion).
  • Comes from Halo (anything that comes from Halo has to be awesome). lol

  • Magazine jams like 1/10 bullets, so basically once, during every two reloads, it'll jam. The good side is that it's easy to fix a jam, just nudge the bullet with your finger.
  • Takes two minutes to load all 5 bullets. (I know I said three in the slideshow, but I modified the gun before I made this instructable and it's easier now to load.)

So, please rate and comment. If you don't like it, save yourself some time and don't bother commenting a bad comment. I worked pretty hard on this gun (5 hours or so).

I've just had a knex war using this gun. It worked really well. The only downside was that I had to hide out for 2 minutes to load. (It was my friend and I playing.) My friend said it kind of hurt, so be careful when using the 5 rubber bands.

Piece List:

RED: 14
GREY 1-SLOT: 29 +2 for every bullet
BLUE 3-D: 8
Y-Connectors: 2

GREEN: 262 +1 for every bullet
WHITE: 132
RED: 4
BLUE: 17

TOTAL: 719 pieces.

Step 1: The Top Magazine/Rubberband Incaser

Picture of The Top Magazine/Rubberband Incaser

I know that the real halo battle rifle does not open up at the top, but I wanted to add something a little bit cooler to the gun.

1: Make two of these walls.
2: Gather these parts.
3: Attach them like so. Leave one Y-connector for the second wall.
4: Attach the second wall on. Put the second Y-connector on.

Step 2: Fake Barrel

Picture of Fake Barrel

This is the fake barrel. The bullet flies out just above it.

1: The completed fake barrel.
2: Build this. This part will attach to the gun.
3: Build this.

Refer back to the first picture if you need help on where to connect picture 2 & 3.

Step 3: The Grip

Picture of The Grip

This grip is pretty comfortable. It's not much to wrap your hand around, but it's sturdy.

1: The completed grip.
2: Build this.
3: Another view if you needed help.
4: Gather these parts.
5: Make this.
6: Areal view: Connect with gray 1-slots. This view makes it easier to build.
7: Remember those white rods that I showed in picture four? Slide them into the slots as shown. Leave the one with the gray 1-slot for the next picture.
8: Slide the gray 1-slot into place.

Refer back to picture 1 if you need help on where to connect. It doesn't really matter which side goes where.

Step 4: The Front Body

Picture of The Front Body

This is the front body of the gun. Its purpose is to hold the three parts we just made.

1: Make two of these walls.
2: Gather these parts.
3: Make these.
4: Attach the pieces from pic. 2 & 3 on the wall in the areas shown.
5: Attach the second wall on.

Step 5: The Magazine

Picture of The Magazine

Not much to say about the Just, don't go searching around your house for a People magazine.

1:The completed magazine.
2: Make two of these.
3: Make two of these.
4: Make two of these.
5: Make this (the pusher).
6: Gather these parts.
7: Attach one of the walls from pic 2 and one of the walls from pic 3 together with the four blue rods.
8: Slide the pieces from pic 4 onto the blue rods like so.
9: Attach a wall from pic 3. Attach a wall from pic 2. Slide the pusher in. Make sure the gray 1-slot at the bottom is flat so the pusher can slide in as high as possible.

Step 6: The Back Body

Picture of The Back Body

This is a very important body because it holds the mechanism, trigger, and handle.

1: The completed body.
2: Make two of these.
3: Gather these parts. You actually only need one orange connector, not two.
4: Attach one gray connector and one orange connector on a wall from pic 2.
5: the gray 1-slot comes off one side and the orange connector comes off the other. Ignore the pieces scattered around my room.
6: Gather these pieces.
7: Attach here on the same wall that you attached the pieces during pic 4 &5.
8: It should look like this now. I don't think you can see it very well, but the gray connector from pic 4 &5 is there.
9: Gather these parts. Set the spare gray 1-slot and blue spacer for later.
10: Slide here.
11: Another view so it's easier to see.
12: Gather these parts.
13: Slide on here. Put two spacers on.
14: Slide on the wheel. Put two more spacers on. You should have 2 grey 1-slots left and 2 spacers left. We'll use them later.
15: Make this (the trigger/blocker).
16: Attach here.

Now put the second wall on. Refer to picture 1 to see how it looks if you need help. Now you should have 4 grey 1-slots and 3 spacers.

17: First, slide one spacer here and put one gray 1-slot on this bar. Also, snap the second gray 1-slot onto the space shown. (Behind the bar.)
18: On the wheel, add a spacer and a gray 1-slot to each side.

Step 7: The Handle

Picture of The Handle

This is the handle. It's pretty comfortable and sturdy.

1: The completed handle.
2: Make two of these.
3: Gather these parts. (1 blue rod and 14 orange connectors).
4: Snap the blue rod and the orange connectors into place as shown in the pic.

Snap the second wall on. Refer to the first pic. if you need help.

Step 8: Connection

Picture of Connection

You're almost done! Connecting is pretty simple. The_Burrito_Master was the first person to make this kind of picture with the pieces separate.

1: All the pieces you have now.
2: Snap the handle and the back body together. It's pretty straight-forward.
3: Attach the magazine to the back body.
4: Attach the front body to the magazine.
5: Attach the grip by putting the red connectors as shown.
6: Connect the front barrel as shown.
7: Make this. (It's the butt of the gun).
8: Snap it into place on the back body.


kwibus24 (author)2012-03-31

mt knex longshot with removable maf an scope holds 15 bulets

joshualater (author)2010-06-07

If someone can figure out how to build mine and post it they can I since took it apart but I have a video of it on YouTube

joshualater (author)2010-02-20

 MINE IS COOLER!!!!!   (though it doesn't fire) i have vid on my utube.

Wonderful - I mean, most of the people that are in to knex guns are looking for guns that don't fire (sarcasm).

~Aeronous~ (author)2009-11-12

one prob. way too big and too many pieces.
although say you made the clip bigger then that would be good, part from that it looks frikin awesome. 5

Wafflicious (author)2009-10-16

cool! Just one thing; the first slingshot gun I've seen is on my favorites list.

imthatguy1125 (author)2009-08-20

well finally a powerful semi auto gun

knexsuperbuilderfreak (author)2009-06-06

sorry its not semi unless there is a part that you fogot

it is semi auto. All u do is pull the trigger until u fire. Sorry if there was any confusion. If u still have quesitons, write another comment or PM me.

actually, it is not semi auto.

lol, this can go on forever, but seriously, semi auto requires u to just pull the trigger and the bullet will fire, while not haveing to reload. This gun does exactly that.

my apologies, Pseudo semi-auto this can fire a limited number of times before having a total reload, like extreme builders semi auto and ednator55's semi auto can fire infinitely inly needing to put new ammo in the magazine, this needs to have bands re-stretched and new ammo loaded.

Ok, now i understand what u were saying. Yes, it does take like 2-3 minutes to reload, so you would have to find a hiding spot during a knex war. I was trying to show a new concept (prototybe maybe) of a new semi auto design.

i can shave reload down to 1:20 but it still is not really worth it becuse in a firepower storm you will still get killed before you can reload unless you have a VERY reliable side-arm.

can you post a vid of the trigger and cog thing

dynno97 (author)2009-02-21

i think the knextutorials one looks more realistic. no offence

TwistedParadox (author)dynno972009-04-28

He didn't make that, get your facts right.

wait, who didn't make it? I made this gun....

knexguntutorials didn't make the gun dynno97 was on about

dynno97 (author)TwistedParadox2009-04-28

Sorry, my Mistake.

none taken

SonicX 22 (author)2009-04-29

if u make the firing mechaism of The Jamalams storm 222 semi auto rifle then u can make this real semi auto

Ur not suposed to put all rubberbands on the same white rod. And, ur not supposed to hold the trigger, either. If u pull the trigger, and release the trigger, then it will (should if you build it right) fire semi-auto.

but this is semi auto...

not realy i put on like 6 rubberbands and it fired automatic not semi auto

knexagunner (author)2009-06-21

i lold @ step 9 hahahahahaaazahaa

Ltcheesecracker (author)2009-03-04

ok... you REALLY have to refrase the the last bit on part 9 of step 5.... that sounds REALLY WRONG!!!!!!

lol "Slide it in"

lol thats what she said!

Wha- oh.

SonicX 22 (author)2009-04-30

(january 16th 2009) ive been looking for an assault rifle for weeks and now i finaly found it! *4.5


Millawi Legend (author)2009-03-11

is this meant to be a spartan laser? because i think it is.

SonicX 22 (author)2009-03-03

i might try to make a bolt action, bottom loading, removable magazine, assault rifle

ILIKEPIE333 (author)SonicX 222009-03-08

if it is bolt action, technically, it is not an assault rifle, it is a bolt action rifle

yerjoking (author)SonicX 222009-03-04

Not that difficult, infact, been done before, and is being done again.

SonicX 22 (author)yerjoking2009-03-04

darnit it looks terrible

yerjoking (author)SonicX 222009-03-05

So? Does looks matter? Pics?

SonicX 22 (author)2009-03-06

this is v1 of my assault rifle pros: Good range (about 30 FT) true trigger comfy handle cons: Not that good looks no magazine sometimes a bullet will hit the yellow rod in the front bends alot

Ltcheesecracker (author)2009-02-24

epic pwnage gun!!!! woohooo!!! 5*!!! (20 if i could) lol thx soo much i am soo makin this!

DrWeird117 (author)2009-01-01

Win. But I don't have the pieces. I THINK.

happybirthday (author)DrWeird1172009-02-18

Epic win haha

SonicX 22 (author)2009-01-17

im doing the back body thing...

ILIKEPIE333 (author)2009-01-13

on step 5 you put 9 steps for 8 pics I think you added one too many make two of these's

agent harmsy (author)2008-12-30

Ahhh! I see!<br/><br/>I was doubting the 'semi-auto' tag, but now I see its got a mech similar to the RBGs. Nice! And a slingshot gun too...<br/><br/>4.5* :)<br/>

thanks! are you going to build?

Hmmmm, not sure. I'm right out of green rods, and still putting the k'nexsayer through its paces (have you built that yet? It's AWESOME!) but if i get sick of some of the other models I currently have up, I'll probably give it a go!

extreme builder (author)2009-01-02

its nice but not semi auto at all u have to load each rubberband

thanks. That doesn't matter. It's like the same as loading a magazine. When your in combat, you pull the trigger and it fires. That is the definition of semi-auto.

yea i guess but it takes soo long to reload lol

About This Instructable




Bio: none, absolutely none
More by PineapplebobTheGreat:Pineapplebobthegreat's Semi-Auto Halo Assault RifleMaple Story Nocturne Wizard StaffPineapplebobthegreat's Knex Cyber Bow
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