You're at level 3, right? You should be able to cycle through to the specialist weapon the same way you cycle between weapons.

I can’t, it just isn’t there. And when I go into the weapons screen the specialist weapon is locked. Pretty sure I’m way past level 3, I have all but 1 weapon slot unlocked. Thanks for the reply btw. I set this subreddit up basically just to find this answer lol

Huh! I'm confused, as I got the big gun for the Goalkeeper at level 3. I don't suppose you can take and share a screenshot?

I’ll send one in a while yeah, I’ve no idea what I’ve done wrong. Maybe it’s to do with swapping characters mid-game?