This is my first instructable for a halo Assault Rifle for around $10-$15, unless if you don't have the tools.

Step 1: GET EVERYTHANG TOGETHER

First, you have to get all the supplies, read this and get everything unless you already have it, or it's optional
Tools:
Jigsaw (required)
Drill (required)
Sander or sand paper (required)
Drillbit big enough to fit the jigsaw blade through (required)
Backup jigsaw blades(optional, unless you don't like sanding)
Materials:
A printer (required)
A 9 and a half in wide, 33 in length, and one or two inches thick(required)
A Sharpie(don't do anything stupid)
A couple of inch long screws (optional)
My blueprint (unless if you can come up with somthing better)(required)
A Pvc (optional)
A drillbit that if you drill a hole the pvc can fit in it without falling out really easily
AND MUCH MUCH patience.

Step 2: The Drawing

Okay, now you have supplies, firstoff, print out the pictures below,
if there are any problems, let me know.
now, since i know what i'm doing, you see my drawing of the assault rifle? click on the I thats on the picture, now you see an enlarged image, on the right toolbar where it says tiny, big fullsize etc. click on full size, once it loads, it should say on the bottom that you can download it, click it and save it where you can find it later.
Do this to all three pieces then print them all out, then try to connect the images and add maybe an inch to the back of the stock,(I didn't think you would want me putting another sheet up with a one inch end of the blueprint)
then connect it.

Step 3: Tracing

now that you've drawn the blueprint,you can cut it out and put it on top of your piece of wood. Now, go around the edges with a marker, preeferably a Sharpie(Yet again, don't get any Ideas)
when your all said and done it should look like this:

Step 4: Cutting

Now, if you just bought a jigsaw and are totally unsure about how to use it, get an adult for help, if your like me and love cutting and do know, then you can do it your self. Just cut along the lines, and don't make your jigsaw move up and down cause it will cut uneven if the blades bend crooked.(and we wouldn't want that now would we?) Thats where the extra blades come in handy, if it comes at an angle that you can't cut because its almost straight up, then go from a different angle so that it meets the cut line, if you do this right, then it should come out good.
Now for the hole in the handle, use a drill with a bit that the jig's blade can fit through then cut along the line, your end result should look like this:

Step 5: Iserting a Barrel

Drill a hole where you want the barrel to be, heres the thing though, get an exactly one inch thick PVC and buy a One inch Drill bit, Make sure they are almost perfect in alignment and drill straight in, or the barrel will be crooked
I'll have pictures up soon.

Step 6: Paint It, Paint It Black

Now, if you've got the barrel cut and prep, paint it, whatever you want, just make sure you buy sealer, its cap is clear and try to give it a lot of coats, the more you do, the less likely it is to scratch.
then after you paint it, paint the barrel and put it in the hole you drilled. Now,use a small drillbit and put in two small screws
in both sides, then you can fill the heads up with spackle
Enjoy;)