The TL;DR version: what jimmy said, but not quite what Ginger said. Sniper in the notes does NOT mean it applies to both shooting and assaults, because the "applies to all attacks" does not mean "applies to all types of attack" it means "attacks by all weapons not just one". The two FAQs are about slightly different things.
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IMO it's another example of bad rulebook wording and no small amount of interpretation on the part of the FAQs. As far as the rulebook is concerned, sniper is a unit ability, not a weapon one. But the rulebook simply does not say whether it affects shooting, assaults, or both. In the rulebook and in Swordwind, marine, guard and eldar snipers all have sniper as a
unit ability.
Then the original 2008 FAQ said this:
FAQ wrote:
Q: Can the Sniper ability be used in an assault?
A: Unless specifically noted on the datasheet (for example, by addition to a small arms weapon), Sniper ability does not apply to attacks in assaults.
This clarified that sniper is supposed to be a unit ability that affects shooting and not assaults, but it also provided a way to make it work in assaults if designed to be so. In that sense Ginger is incorrect: sniper in the notes section does not mean it applies in assaults - indeed that is how it is specified for most sniper units in the game.
First Strike on the other hand is actually described only as a
weapon ability in the rulebook, which makes no mention of it is a unit ability, only this:
Rulebook wrote:
If the ability is noted for a weapon with extra attacks (see 2.2.3) then only the extra attacks gets the first strike ability; otherwise it will count for all close combat attacks if noted for an assault weapon, or all firefight attacks if noted for small arms.
Implying that it is either applies to close combat OR firefight, never both. Note however that it does explicitly tell you how to handle the combination of First Strike and Extra Attacks. Then Swordwind came along and gave warp spiders first strike in the unit notes, as opposed to banshees who had it in the weapon notes. Thus again the 2008 FAQ has to explain this. It does this by generalising the issue with a Specialist Units FAQ:
FAQ wrote:
If the special ability appears in the weapon description, it applies only to attacks by that specific weapon. If the special ability appears in the “Notes” section of the datasheet, it should be applied to all actions by the unit.
It gives First Strike as a specific example. It seems in contradiction with the FAQ for Sniper, but
actually they are about two different things - the Sniper FAQ is about shooting vs assault, whereas the Specialist Units FAQ is about "
this weapon vs
all weapons.
To further confuse the matter, there is a third 2008 FAQ about First Strike and Extra Attacks specifically, which in rules terms only repeats what the rulebook says, i.e. if it is specified for a weapon with extra attacks then it applies only to that weapon's extra attacks. However it explains it in terms introduced by the the Specialist Units FAQ, i.e. the difference between specifying First Strike on a unit versus on a weapon with extra attacks, which is different to how the rulebook explained it. The rulebook explained it in terms of the difference between applying it on a weapon with extra attacks versus a weapon that does not have extra attacks. It's confusing, but all it's trying to do is clarify that when a weapon has extra attacks, those extra attacks represent
all of the weapon's attacks - and that the unit's normal firefight/CC value represents some other weapons. Thus giving First Strike to a CC weapon with extra attacks applies it to that weapons attacks, applying it to a regular CC weapon applies it to the unit's general effectiveness in close combat, and applying it to a unit affects the unit's general effectiveness in both CC and FF.
To give a full example:
Chainswords (base contact) (Assault weapon)
Storm bolters (15cm) (Small arms)
Grenades (base contact) (Assault weapon) Extra Attacks (+1)
Here the base CC value comes from the chainswords, the base firefight from the storm bolters, and the extra attack comes from the grenades. Giving First Strike to the grenades would apply it to just the extra attack that came from the grenades. Giving it to the chainswords would apply it to both the chainsword and grenade CC attacks (even if it seems weird). Giving it to the unit as a whole would apply it to all CC and FF attacks.
To illustrate the difference between the Specialist Units FAQ and the Sniper FAQ, you can apply the consequences of the Specialist Units FAQ to Sniper as so:
Sniper Rifles (15cm) (small arms)
Heavy Bolter 30cm AP5+
Lascannon 45cm AT5+
Unit notes: Sniper
This unit has Sniper on all its shooting attacks - HB and lascannon - but not its sniper rifles. This is because Sniper normally affects shooting (and the Specialist Units FAQ doesn't change this), but because it is a unit ability it affects
all shooting attacks. When you upgrade marine scouts with Sniper, you are actually giving them sniper for their Heavy Bolter and not their sniper rifles...
Now:
Sniper Rifles (15cm) (small arms) Sniper
Heavy Bolter 30cm AP5+
Lascannon 45cm AT5+
This unit on the other hand only has the Sniper ability on the sniper rilfles (thanks to Specialist Units FAQ), which applies in firefight and NOT in shooting (thanks to Sniper FAQ).
And finally:
Sniper Rifles 15cm AP5+ Sniper
Heavy Bolter 30cm AP5+
Lascannon 45cm AT5+
This unit has Sniper only on its sniper rifle and not on its other weapons (thanks to Specialist Units FAQ), but this applies to its shooting attack as normal and NOT to its firefight (see Sniper FAQ). If the Sniper Rifles had a second line for Small Arms which also had the Sniper ability, then it would apply to firefight too.