The armour in megamn x4 till conist of four parts and it is ha improved its fire power.It is even better to be able to choose from 2 hand upgrdes.
FORCE ARMOUR
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This force armour can be found in the Jungle area.It is located in a cave to the right of the waterfall.You will need to jump down from the top at the begining and there will be 3 platforms you have to jump on.It is on the third platform.
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I do not need to describe the place in detail cozz you just need to be quick enough to get rank at the teleporter in cyber space.
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This armour part is located in the air force area.It can be found in area 2 and you need the lightning web to avoid the spikes.Jump onto the web quickly and do not press the dash button.You will find 2 capsules for the hand upgrde and it is up to you to choose them.
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In the valcano in area 2 , it is loacted at the top and you need to charge up the twin slasher after gaining it from defeating slah beast and break the wall with it.