Actaea

But doesn't it allow you to focus on assault rifles? I just don't understand the logic...

Military Training (5 Skill Points)

I only need assault rifles, which are already available from Weaponization.

Weapon Specialization (3 Skill Points).
When using the selected weapon type, the character shoots and reloads faster, and misses less often (shotguns, pistols, assault rifles, melee weapons).
The character gains the ability to use sniper rifles/heavy weapons.

I only need assault rifles from here, no sniper rifles, no heavy weapons.
Do I still have to spend 5 Skill Points on something unclear?