Even the IRS doesn't hide their tracks that well.
Go to archive.org, and "go back" to http://www.treas.gov/sba/irssic.html
Then go down to "SIC Code 3484" and tell me why a bunch of tax collectors need $200,000 worth of Remington 11-87 shotguns and $1,000,000 worth of Sigarms semi-auto pistols.
Check "SIC Code 3669", while you're at it.
The revenooers didn't hide this; how did the MECHA guys do it?