Equip Star Wars Battlefront 2 unlocked weapon?

I unlocked a new one for the special unit (Sniper) in Star Wars Battlefront 2 on PS4 (supposedly) because I did 50 kills. Now I'm wondering how I can equip the weapon. I was already under the gun, but it was still locked there, so I thought I would have to pick up the gun somehow under the milestones, but there was nothing there to pick up the gun (the milestones just said I had it Mission, but somehow I don't have this weapon). Does anyone know how I can really equip the weapon now?

Should be in a box. So have to look on the home screen

Have you already opened the box… In the main menu on the left

Start screen at the bottom left of the box

I have no nope, thank you

Jup thank you