"...if the assault is upon certain federal officers ‘while engaged in or on account of . . . official duties,’ the maximum term of imprisonment under 18 U.S.C. § 111 is three years. If a dangerous weapon is used in the assault on a federal officer, the maximum term of imprisonment is ten years. However, if the same weapon is used to assault a person not otherwise specifically protected, the maximum term of imprisonment under 18 U.S.C. § 113(c) is five years. If the assault results in serious bodily injury, the maximum term of imprisonment under 18 U.S.C. § 113(f) is ten years, unless the injury constitutes maiming by scalding, corrosive, or caustic substances under 18 U.S.C. § 114, in which case the maximum term of imprisonment is twenty years.",
AMENDMENT 614 Amendment: The Commentary to §2A2.2 captioned "Application Notes" is amended by striking Notes 1 through 3 as follows: "1. ‘Aggravated assault’ means a felonious assault that involved (A) a dangerous weapon with intent to do bodily harm (i.e., not merely to frighten), or (B)...
Note the term "maximum". It can always be less and, so far, has been.