Why does the NRA oppose background checks? The NRA supported our current system of background checks, so the premise of the question is actually invalid, but I suspect that what was intended to ask was why background checks on private sales are a nonstarter. That is simple: it is for the same reason the exemption was originally codified into law.
They mistake pains in the back or stomach as pain in kidney area. There is also a misconception about the location of the kidneys. Many people believe the kidneys to be located somewhere in their lower abdomen region. Actually, it is placed just below the diaphragm on each side of the body.
The right kidney is located under the diaphragm and behind the liver. The left kidney is also located under the diaphragm but behind the spleen. Your kidneys are on your back sides just below your ribcage, yet above your waist.