i don't think that trump is really happy that he survived. a quick death would have removed all his problems.
Authorities have indicated that father had twenty guns registered to him at the family home including the 5.56 cal AR-15 style used. Discussed here a little after three minutes. That's what made the GOP's secret database of gun owners place him so high.
Yes however redundant in casual conversation? Caliber is universally used for either measurement system and a 5.56 inch bullet would do more than graze an ear. If an AR-15 was constructed to take 5.56 inch rounds, using simplified calculations, it would be around 76 feet long? Scaling factor of 25.4 on a three foot gun. I believe I did well saying AR-15 style and not just AR-15 though?