Typhoon in Deus Ex HR?

Where is the typhoon in Deus EX HR. I checked the LIMB store, all I see everywhere in the game is Typhoon weapon, How do access/ sue the Typhoon?

You have to unlock it with 2 praxis points in your character screen, 3rd praxis point upgrades typhoon damage. Then press F2 to activate. You must have a full battery and typhoon ammo.

can you tell me which augment it is or at what point in the game you unlock it? i checked the augment screen and i see nothing that says typhoon. i am already about 4 missions into china

Left side. Arm slot augmentations. Read each aug carefully. It's there mate.

You buy the amunitions for it from the LIMB clinics.