Not sure if there is already a topic for this, but I was having a brikwar today and thought, "What if some characters could have a weapon proficiency or specialization ability that lowered the UR of their selected weapon"? I thought that marksmanship and shock troop were similiar, but this idea would allow a minifig to gain this bonus with only one specific weapon. For Example:
Battleaxe Proficiency (+2 CP) When using a battleaxe, this unit subtracts the UR by 1.
Alternative versions could increase damage or range, etc.