You unlock It o use freely after level 4 of which you can use create a class
You unlock it at level 36.
Level 38
The TMP is unlocked on level 58.
level 67
Level 22 :)
you have to reach level 50
Level 22 (Master Sergeant I)
Level 48
You unlock the RPG at level 65.
Yes, it is the final gun to unlock in the game.
you level up and earn them all
You get it all at a certain level