1. Damage from special unarmed attacks never shows in the inventory screen, even in vanilla. 2. Spiked knuckles itself has 4-10 dmg, and your Melee Damage will be added to its max damage. So 4-13 is correct with Bonus HtH Damage fix from sfall. Like I said, the +2 damage from the perk won't show up in the inventory (unless you enable DisplayBonusDamage option), as the same as Bonus Ranged Damage that you don't get 7-14 dmg but still 5-12 with 10mm pistol either. 3. ...have you checked his combat control settings? And he can only use guns with SMG attack frames.