Assault Rifle Prop Replica Pt 2

I've been working on this non-stop and only just sat down to make this. 

Major mistakes I made:
1. I am terrible at cutting, but I know some of this comes with practice. Practicing cutting straight and holding the knife perpendicular to the foam would have helped, though I still really sucked at it. 
2. Not letting the contact cement set up enough. Ten minutes wasn't enough for it to perform at its best. I found it worked better to wait 15-20 minutes.
3. Keep that damn blade sharp. I don't have a sharpener and even though I tried to switch blades often, it wasn't often enough. One swipe with a dull blade can ruin everything. I recommend a HEAVY DUTY knife with a sharpener or lots of blades. Just go through them like crazy because it's worth it to have a sharp cut. You can't really fix it later like you'd think.
4. MARK MARK MARK! I marked my foam in key places to match it up when adhering, but it wasn't enough. Mark it every few inches to make sure you're on track.

Stay tuned!

Part 1: