Original sentence: "  For example, the AK-47 is a "far more wicked gun than an AR-15." It has a larger more powerful 7.62 mm caliber and is more reliable compared to the." It is believed these shooters don't know much about guns and use the AR-15 based on the rep it has received from other shootings." The military is said to be considering changing to a higher-caliber rifle partly to make there weapons more deadly.223 round and the standard AR-15 being used.But the police "choose it because it is under-powered...", "making it less likely to penetrate interior walls and hit an unintended target.He also stated "There are rifles that are more powerful and more dangerous than that, but they're not being used.It is suggested that shooters perhaps choose the AR-15 because it is the "weapon of choice" for police and military.Reported by USA Today, a master firearms instructor, said "the reason mass shooters are turning to the AR-15 is due to a "copy-cat" mentality more than any feature of the rifle