Assault rifle – Tuned for mid to long-range engagements, the M16 features a 3-round burst rifle that has increased range and stability.
| Level | Unlock | Type |
| 2 | Muzzle category | Equip muzzle attachments to this weapon |
| 3 | 14” Carbine Shroud – barrel | M4 platform attachment |
| 4 | Laser category | Equip laser attachments to this weapon |
| 5 | C400 Door Knocker – muzzle | Universal attachment |
| 6 | Rear grip category | Equip rear grip attachments to this weapon |
| 7 | 15 Round Magazine – magazine | Universal attachment |
| 8 | Optic category | Equip optic attachments to this weapon |
| 9 | 11.5” Carbine Shroud – barrel | M4 platform attachment |
| 10 | Underbarrel category | Equip underbarrel attachments to this weapon |
| 11 | SZ Pro-7 – optic | Universal attachment |
| 12 | Stock category | Equip stock attachments to this weapon |
| 13 | SPW 40mm – underbarrel | Universal attachment |
| 14 | Ammo category | Equip ammunition attachments to this weapon |
| 15 | D15 Grip – rear grip | M4 platform attachment |
| 16 | Weapon tuning | Fine-tune attachment performance on this weapon |