So I attempt to stay as current as possible with the SAFE Act but I keep hearing all sorts of stuff. Stopped at my local gun shop the other day and they are selling AR lowers like there's nothing new. They informed me that they can sell the lowers because it is the responsibility of the gun owner to assemble it to NY specifications. My question is if AR's don't need to be "registered" until 2014 (I think April), then how will anyone know that the AR was assembled before or after the SAFE Act was passed? If I put a pistol grip on it today is it an "illegal" "assault weapon" or a legal one that has not been registered yet? Are they just going by the background check dates and serial numbers and tracking them that way? I hate those stupid CA and NY stock assemblies for this law. This may just be gibberish anyways but if I would to find a lower that a friend was selling and bought it without a background check through an FFL they wouldn't be able to determine dates when/if I register next year anyways. Would they?