I went to Catholic school as a child and eventually became Catholic because of a very cool nun teacher I had in 8th grade. She was an avid sport shooter and hunter. She took me hunting until I left home on a huge piece of land that the diocese owned and used for religious retreats during the summer. Most of her teaching salary was spent buying guns and teaching any youngster who signed up for her training course how to shoot.
She told us that to be truly faithful to Our Lord one must be armed to defend the helpless against the evil. This was the 50s, so nobody really questioned her attitude. Today she most likel would censured because the majority of Catholic laypeople are raving liberals.
Incidentally, she owned the AR-15 of that day, the M1 Garand. She also had a Springfield '03, a 1911, M1 carbine, and a British .303.
Sister Elizabeth, I know your looking down on your godson making sure my aim is true. May you reast in Peace.