Those're to go over the end of the muzzle, right? For water resistance? <winkwink nudgenudge> knowwhatImean?knowwhatImean?No, next time your buddy wants to go shooting offer to drive and on the way home tell him you need to stop to pick something up. Then you carry one and ask him to help you carry a second without telling him what you want them for.
Report back on the looks you get
Oh yea, perhaps you want to buy a bulk pack of condums too, for the benifit of the nice lady checking you out.
Oh, and as for the reason for disarming people after Katrina:
They don't need any reason other than a) people have guns and b) It's a day that ends in Y.
Blessings,
B