Google/Bing censoring shopping results for guns?

I was tipped off to a curious occurrence with a google search combination that yields some curious results.  Not sure what to make of this, but it appears that Google and Bing both censor firearm related shopping results.  My source told me to search for misspelled variants of the words "Gun, Rifle, and Pistol" and sure enough, he was right.  I don't know how I feel about this but I do know something more than search is going on here.