It's called proper terminolgy. I prefer correct terminolgy so things are not easily mistaken. "Look out, private there is an M16 here." Private trips over a M16 mine looking for a M16 rifle.
Shooting weapons in the following calibers: .22lr, 5.7x28, 5.56 nato, 9mm nato, 7.62 nato, .357 magnum, .40 s&w, 10mm auto, .45 acp, and 12 gauge.