In the wake of the Sandy Hook Elementary School massacre, and its reprehensibly cynical exploitation by advocates of forcible citizen disarmament, decent American citizens have been preparing to defend against an all-out onslaught on so-called "assault weapons" and "high capacity" magazines. This is understandable.
Private sales--the so-called "gun show loophole," despite the fact that even anti-gun groups are no longer trying to hide the fact that they want to ban all private sales, whether at gun shows or not--might be a different story. The guns used in the Connecticut school massacre were not purchased at a gun show, and certainly not purchased without a background check (and the purchaser, Nancy Lanza, would apparently have been very unlikely to be found "unsuitable" to purchase firearms even under the ever more restrictive and intrusive background checks pushed by anti-gun fanatics).
Worth reading: Gun Registration is Gun Confiscation