[Rogue One Stormtrooper Backpack Parts Identification]

Great thread!

What are everyone's thoughts on something like this for the top pack?  The length matches up almost exactly with the dimensions of the box (30cm+40cm+30cm): http://www.ebay.com/itm/172018066338

As for the metal piece hanging from the strap, I've done lots of random searching but haven't made much progress.  Anyone have any ideas on that

[How to: T-21 Blaster scratch build]

Thanks for posting this! It convinced me that I could build a T-21 and has been a fantastic resource.

One question that I'm still struggling with: what size PVC should be used on the receiver/body? The tutorial mentions 2", although standard 2" schedule 40 PVC seems too big. The two options I've found are 1.5" PVC (just under 2" OD) and 2" tubing for a central vacuum system (exactly 2" OD, thinner walls). Anyone else run into this and have a better option?