Inspired by this post, NFA Fun Data by state, and feeling that Utah was underrepresented, I crunched some per-capita numbers using the census estimated populations for 2014. Here are the top states for each section (per 10,000 people):
Top state for Machine Guns: Connecticut at 74 per 10k people
Top state for Silencers: Utah at 171 per 10k people
Top state for Destructive Devices: Wyoming at 2,022 per 10k people (D.C. is #2 at 583)
Top state for Short Barreled Rifle: New Hampshire at 21 per 10k people
Top state for Short Barreled Shotguns: Alaska at 16.9 per 10k people (D.C. a close 2nd place at 16.6)
Top state for Any Other Weapons: Wyoming at 5 per 10k people
Top state for FFLs: Wyoming at 15.3 per 10k people (Montana a close 2nd place at 15.2)
Utah made the list!
I must admit that I was initially surprised to see D.C near the top of the lists, but I suspect that it is due to Law Enforcement Agencies. It is interesting to note that D.C. only has 25 FFLs. Also, I have no idea why there are so many destructive devices per person in Wyoming.