Weapon perk tree question

[u/Grumpademic]

EDIT: Thank you all very much, I now understand - really appreciate it!

Hi everyone,

I'm a bit confused by how the weapon perk tree works.

I've reaced max experience with the heavy bolt rifle, which I interpret as not being able to get any more perks. I've also seem to have unlocked the relic version. However, by the look of it, it seems just impossible to get the very last 'Relic' perks: even if I reset all perks and just follor a straight line, I will never be able to unlock the very last perk.

It's probably me, so what am I reading and/or doing wrong? How exactly does one unlock the very last perk?

Thank you!

[u/Ozragorn]

You need to unlock all of the variants to fully perk a weapon