Equipment in Modern Warfare 2 includes Lethal and Tactical. Lethals are deadly with the ability to toss them and plant some of the others. All Tactical equipment can be tossed and mainly used to confuse the enemy.
Lethal
Frag
Cookable frag grenades.
Unlocked: Default
Semtex
Timed sticky explosives.
Unlocked: Default
Throwing Knife
Throw it and pick it back up.
Unlocked: Default
Tactical Insertion
Choose where to respawn.
Unlocked: Level 11
Blast Shield
Increased explosive resistance.
Unlocked: Level 19
Claymore
Proximity activated explosive mine.
Unlocked: Level 31
C4
Remote detonation explosive.
Unlocked: Level 43
Tactical
Flash Grenade (x2)
Blinds and deafens target.
Unlocked: Default
Stun Grenade (x2)
Disorients and slows targets.
Unlocked: Default
Smoke Grenade
Smoke Screen.
Unlocked: Default