It doesn't take much misdirection and people assuming things are what they think they are - I carried a folding stock vz-58 around town in a UTG Covert case with not a single soul noticing anything odd. 1st, this was an experiment, and 2nd, yes it was completely legal in AZ.
What is REALLY funny is the Scorpion in the obvious Uncle Mikes subgun case being ignored...that's more of a case of some one looking and doing the mental, "Nahh, can't be"...and wandering off.
I was going to make a square bag and decorate it with a company logo, "The Johnson Porta Potty Reamer/Cleaner - we're Number One in the Number Two business!" Add a couple of painted on brown stains, and voila! Nobody will EVER touch it...