The issue focused on guns used by criminals who buy guns legally but don’t commit crimes. 
 
 https://en.wikipedia.org/wiki/Lateral_velocity_of_bullets_is_a_velocity_delta 
 
 https://en.wikipedia.org/wiki/Two_metrics_of_velocity_of_bullets_%28velocity_of_bullets_%28distance_of_bullets_%28velocity_of_bullets_%28distance_of_bullets_%28distance_of_bullets_%28distance@@