If the defendant possessed a semiautomatic firearm capable of accepting a large capacity magazine in connection with a crime of violence or controlled substance offense, an upward departure may be warranted. A "semiautomatic firearm capable of accepting a large capacity magazine" means a semiautomatic firearm that has the ability to fire many rounds without reloading because at the time of the offense (A) the firearm had attached to it a magazine or similar device that could accept more than 15 rounds of ammunition; or (B) a magazine or similar device that could accept more than 15 rounds of ammunition was in close proximity to the firearm. The extent of any increase should depend upon the degree to which the nature of the weapon increased the likelihood of death or injury in the circumstances of the particular case.
1. "Crime of violence" and "controlled substance offense" are defined in §4B1.2 (Definitions of Terms Used in Section 4B1.1).