Make your own.
Check out this awesome NERF Vulcan sentry gun built by YouTuber BrittLiv! Wanna make your own? Take a look at the original design by Bob Rudolph on Instructable!
For all your Katniss, Hawkeye, Lara Croft cosplay needs: Follow this tutorial
Click the image to see a larger version!
Get a high-res printable from My Little Mod Blog.
Based on the song from the episode "The Rings of Akhaten."