This guide will tell you how to unlock Weapons & Guns in Warzone 2 (3 Ways to Unlock).
First of all, you have to press R1 and then go to the weapons where you can see your load-outs. After that, pick up a gun from here. To unlock weapons, you have to level the guns. After selecting a gun you have to press the touchpad as it will open the platform page. From this page, you can see your progress. On this page, you can also see if you level up the selected weapon and which other weapons you can unlock.
The second method to unlock the weapons is you have to go to guns and then select the category of the gun. After that, select a gun from that category and go to the gunsmith. From here, you can put different attachments but first, you need to check if you have a blueprint for the weapon.
If you want to unlock a weapon in DMZ mode, then your friend has to drop a weapon that is locked in your account. When you pick up that weapon and you X fill with it, it will unlock the base version of that weapon.