I did a lot of shooting before the military.
I owned Garands, carbines and others,
One thing I saw was that guys who never fired a weapon took the training and became vert good shots.
They had no bad habits to unlearn.
WTF is it with youngsters aspiring to hide behind rocks and kill people?
If that's your life's aspiration, I believe you won't pass the mental exams.
The military is about teamwork-no place for "lone wolf" commando wannabees.