The NICS check is not guaranteed to actually be instant. The answer has to be returned within three days if memory serves, or the buyer gets the gun without the check. Perhaps this time period should be lengthened, but it certainly should not be eliminated. To do so would mean that the government can suddenly make it impossible for any gun store to complete any legal sale at a whim.

Other delays don't make the NICS any more accurate. They only serve to assuage fears of someone going down to buy a gun in anger. As Homer said, "Five days? But I'm mad now!"