Old and new COD players are perplexed with the Weapon Platforms and Receiver system introduced in Call of Duty: Modern Warfare 2. The new system can get a bit hectic to get used to, but it isn't that difficult once you've understood the general idea of how the Receivers work.

In summary, each new Weapon Platform has weapons of different categories (Assault Rifles, Battle Rifles, SMGs, etc.) in that single platform. By default, one weapon within each platform is already unlocked. You can unlock the rest of the weapons by leveling up the default weapon to reach a specific level, at which point the Receiver for the next weapon will unlock.

The Receivers essentially convert your weapon into a completely different weapon. Some weapons require you to unlock weapons in a different Weapon Platform before you can unlock them. This going back and forth between platforms can be confusing.

The new UI in Modern Warfare 2 doesn't make it any easier to navigate the weapon platforms. In this article, we've listed all the weapons and their respective Weapon Platforms, Receivers, and unlock requirements, so you can easily identify what weapon you must level up to unlock the weapon of your choice.

We've separated each table into a specific category (Assault Rifles, Battle Rifles, SMGs, etc.). The tables will be updated as well get more weapons in the future seasons.

Assault Rifles

Weapon

Unlock Requirement

Weapon Platform

M4

Unlocked by Default

M4

M16

Reach 556 Icarus Level 14

M4

TAQ-56

Reach Level 19

Tactique Verte

STB 556

Reach Level 41

Bruen Bullpup

Lachmann-556

Reach Lachmann-762 Level 12

Lachmann & Meer

Kastov 762

Reach Level 23

Kastovia

Kastov 545

Reach Kastov 762 Level 13

Kastovia

Kastov-74u

Reach Kastov 545 Level 13

Kastovia

Battle Rifles

Weapon

Unlock Requirement

Weapon Platform

FTAC Recon

Reach M4 Level 14

M4

TAQ-V

Reach TAQ-56 Level 11

Tactique Verte

Lachmann-762

Reach Level 16

Lachmann & Meer

SO-14

Reach EBR-14 Level 12

Ordnance Weapon

Marksman Rifles

Weapon

Unlock Requirement

Weapon Platform

TAQ-M

Reach TAQ-56 Level 20

Tactique Verte

LM-S

Reach Lachmann-762 Level 16

Lachmann & Meer

EBR-14

Unlocked by Default

Ordnance Weapon

SP-R 208

Reach Level 7

Bryson Long Rifle

SA-B 50

Reach SP-R 208 Level 16

Bryson Long Rifle

Lockwood MK2

Reach Level 28

Mark 2

LMGs

Weapon

Unlock Requirement

Weapon Platform

556 Icarus

Reach M4 Level 19

M4

HCR 56

Reach STB 556 Level 20

Bruen Bullpup

RAPP H

Reach Lachmann-556 Level 12

Lachmann & Meer

RPK

Reach Kastov 762 Level 16

Kastovia

Sakin MG38

Unlocked by Default

Sakin MG

RAAL MG

Reach Level 25

RAAL

SMGs

Weapon

Unlock Requirement

Weapon Platform

FSS Hurricane

Reach FTAC Recon Level 17

M4

MX9

Reach STB 556 Level 13

Bruen Bullpup

Lachmann Sub

Reach Lachmann-556 Level 12

Lachmann & Meer

Vaznev-9K

Reach Kastov-74u Level 15

Kastovia

Minibak

Reach Vaznev-9K Level 14

Kastovia

Vel 46

Unlocked by Default

LMP

PDSW 528

Reach Level 5

Tactique Defense

Fennec 45

Reach Level 38

Fennec

BAS-P

Complete Sector A6 of the Season 1 Battle Pass

Bruen Ops

Handguns

Weapon

Unlock Requirement

Weapon Platform

X12

Reach Level 31

XRK

X13 Auto

Reach X12 Level 10

XRK

P890

Unlocked by Default

Bruen 890

.50 GS

Reach Level 13

Sakin G Series

Basilisk

Reach Level 39

Basilisk 500

Shotguns

Weapon

Unlock Requirement

Weapon Platform

Bryson 800

Unlocked by Default

Bryson 800 Series

Bryson 890

Reach Bryson 800 Level 16

Bryson 800 Series

Lockwood 300

Reach Level 36

Lockwood Sport

Expedite 12

Reach Level 9

Expedite

Sniper Rifles

Weapon

Unlock Requirement

Weapon Platform

MCPR-300

Unlocked by Default

MRBA

LA-B 330

Reach SA-B 50 Level 17

Bryson Long Rifle

Signal 50

Reach Level 44

Signal

SP-X 80

Reach LA-B 330 Level 17

Bryson Long Rifle

Victus XMR

Complete Sector A7 of the Season 1 Battle Pass

Imperatorium

Launchers

Weapon

Unlock Requirement

Weapon Platform

PILA

Unlocked by Default

N/A

STRELA-P

Reach Level 14

N/A

JOKR

Reach Level 24

N/A

RPG-7

Reach Level 32

N/A