[Kameron8]

When using a Moonlight Mercy in my main hand, it randomly became a Jackhammer as far as targeting was concerned. I snagged the relevant debug logs when shooting it:

Debug: Total Power for Ace in the Hole / Ace in the Hole was 0.
Debug: Attack type: /obj/skill/fe_attack/gun/jackhammer
Debug: Ace in the Hole; rounds = 1, rounds_over = , bonus_dmgs = 85, bonus_dmg_over =
Debug: bonus_dmg_this = 85
Debug: Basic Attack - Weapon Ace in the Hole; 0
Debug: Total Power for Ace in the Hole / Ace in the Hole was 0.
Debug: Critical Multiplier for this attack is: 150%
Debug: no_armor was in flags
Debug: projectile was in flags