So the question is, with the card bombarded specialist can I attack with primary weapon at range 4 treating it as range 3? And if I'm attacking with a hardpoint that's range 2-5, can I treat range 4 as 3 so the defender adds only 1 green dice(or the same thing from range 3 to 2) and I an attack with that same harpoint at range 1 treating it as 2?

Thanks

No to all. There are no "treat as" clauses on the card. Bombardier Specialists gives you a linked white calculate action when you perform a Lock action, and you can the spend the calculate token when attacking to increase or decrease the range of the weapon beyond it's usual limits.

So, you could spend a calculate token to extend the range of a range 3 weapon to range 4, but the defender would get the range 4 bonus.

However, it's worth noting that range bonus es don't apply to missiles/torpedoes, so using Bombardier Specialists with a Huge ship, you could potentially fire a Proton Torpedo at range 4, and the defender wouldn't get arange bonus.