What type of transistor is controlled by voltage

a FET and a Bipolar Transistor

Any VOLTAGE signal used the junction transistor base circuit must be converted (or limited) to a current of suitable size using a resistor or other device. Hence the junction transistor is a current controlled device that can be made to operate with an input voltage and external circuit components.

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Not really a Engineering person but I tried and answer correctly

how is this a question? in order for me to answer it i have to understand the question

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assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.