There are a variety of weapons in Call of Duty 4: Modern Warfare ranging from rifles to pistols to grenades. The weapons are:

1. Multiplayer
   1. Ac130
   2. Airstrike
   3. AK-47
   4. AK-47u
   5. Artillery
   6. AT-4
   7. AW-50
   8. Barrett
   9. Bomb
   10. C-4
   11. Claymore
   12. Cobra 20mm
   13. Cobra FFAR
   14. Colt-45
   15. Concussion grenade
   16. Desert Eagle
   17. Dragunov
   18. Flash grenade
   19. Frag grenade
   20. G-3
   21. G-36c
   22. HindFFAR
   23. Humvee 50cal
   24. M1014
   25. M-14
   26. M-16
   27. M-21
   28. M-4
   29. M40a3
   30. M60e4
   31. MP44
   32. MP5
   33. P90
   34. Remington 700
   35. RPD
   36. SAW
   37. Skorpion
   38. USP
   39. Uzi
   40. Winchester 1200
2. Single-player
   1. 50cal turret technical
   2. AC130 (105/25/40mm)
   3. AGM114
   4. Airstrike
   5. AK-47
   6. AK 74u
   7. AT4
   8. AW50
   9. Barrett
   10. Barrett fake
   11. Beretta
   12. BM21 missile
   13. BMP Turret
   14. Bog mortar turret
   15. Bradley turret
   16. Brick blaster
   17. Brick bomb
   18. C-4
   19. Claymore
   20. Cobra 20mm
   21. Cobra air support
   22. Cobra FFAR
   23. Cobra hellfire
   24. Cobra seeker
   25. Cobra sidewinder
   26. COD3MG42 turret
   27. Colt45
   28. Desert eagle
   29. Dragunov
   30. Flash grenade
   31. Frag grenade
   32. G3
   33. G36c
   34. GP25
   35. Heli minigun
   36. Heli small arms
   37. Heli spot light
   38. HindFFAR
   39. Hunted crash missile
   40. M1014
   41. M14
   42. M16
   43. M1A1
   44. M203
   45. M4
   46. M40a3
   47. M4m203
   48. M60e4
   49. Mark19
   50. MG42
   51. MI28
   52. MP44
   53. MP5
   54. P90
   55. Remington 700
   56. SA6 missle
   57. Saw
   58. Skorpion
   59. Slamraam missile
   60. Smoke grenade
   61. Stinger
   62. T72 turret
   63. USP
   64. Uzi
   65. Winchester1200
3. ZPU turret