Reach the indicated level to unlock the corresponding bonus:

Level 1: 250 experience points
Level 2: SPAS 12 Shotgun
Level 3: 500 experience points
Level 4: UMP 45 SMG
Level 5: 750 experience points
Level 6: XM29 L5S Shotgun
Level 7: 1,000 experience points
Level 8: Glock 18 Pistol
Level 9: 1,500 experience points
Level 10: P90
Level 11: 2,000 experience points
Level 12: MP7A1 SMG
Level 13: 2,500 experience points
Level 14: Skorpion VZ83 SMG
Level 15: 3,000 experience points
Level 16: Type 95 SMG
Level 17: 4,000 experience points
Level 18: AUG PARA Assault Rifle
Level 19: 5,000 experience points
Level 20: 500 Tactical Shotgun

__________________
Rants
Faces Manager