The coding in this is horrible. Game breaking bug that doesn't allow your bullets to register on the target. Some players can shoot through walls while others, can shoot someone in the head and it does no DMG.
Ex. I've emptied half a magazine into someone's face point blank, the character didn't even flinch, then he snapped with auto aim using a sniper and took me out in 1 hit... Games broken, shame on Ubisoft for this, they've made a lot of good games but this one is their worst work by far until they figure it out