Mint azt már megszoktuk,a CoD MW3-ban is lehet fejlődni akárcsak az elődeiben.Most ismertetem veletek hogy milyen szinthez milyen fegyverek tartoznak(szerintem fölösleges átfordítani magyarra a neveket,hiszen a játékban úgyis angolul jelenik meg):
Level 5: Throwing KnifeLevel 6: SCAR-L (assault rifle)Level 8: SPAS-12 (shotgun)Level 10: P99 (handgun)Level 11: Blind Eye perkLevel 12: Dragunov (sniper)Level 13: Scrambler (tactical)Level 14: PKP Pecheneg (LMG)Level 15: Hardline perkLevel 15: Revenge (death streak)Level 16: MP9 (machine pistol)Level 18: CM901 (assault rifle)Level 19: Sitrep perkLevel 20: Specialist (strike package)Level 21: EMP Grenade (tactical)Level 22: A550 (sniper)Level 22: Extreme Conditioning perkLevel 24: Javelin (launcher)Level 26: AA-12 (shotgun)Level 27: Assassin perkLevel 28: PP90M1 (SMG)Level 29: Smoke Grenade (tactical)Level 30: MP412 (handgun)Level 30: Steady Aim perkLevel 32: Type 95 (assault rifle)Level 32: Final Stand (death streak)Level 36: Skorpion (M. Pistol)Level 37: Bouncing Betty (anti personnel mine)Level 38: P90 (SMG)Level 39: Scavenger perkLevel 40: Stinger (Launcher; vehicle lock-on only)Level 42: G36C (assault rifle)Level 44: RSASS (sniper)Level 45: Trophy System (deflects enemy explosives/missiles)Level 46: .44 Magnum (handgun)Level 47: Overkill perkLevel 48: Striker (shotgun)Level 50: ACR 6.8 (assault rifle)Level 51: Martyrdom (death streak)Level 52: XM25 (launcher)Level 53: Claymore (anti personnel mine)Level 54: MK46 (LMG)Level 55: Dead Silence perkLevel 56: PM9 (SMG)Level 57: Dead Man's Hand (death streak)Level 58: Five Seven (handgun)Level 60: MK14 (assault rifle)Level 61: Tactical Insertion (marker to place your next re-spawn)Level 62: Model 1887 (shotgun)Level 64: M320 GLM (launcher)Level 66: MSR (sniper)Level 68: AK-47 (assault rifle)Level 69: C4 ExplosivesLevel 70: G18 (machine pistol)Level 71: Hollow Points (death streak)Level 72: M60E4 (LMG)Level 74: MP7 (SMG)Level 76: Desert Eagle (handgun)Level 77: Portable Radar (shows enemy movement within its radius)Level 78: FAD (assault rifle)Level 80: RPG-7 (launcher)