Riddle

I kill people when you need me to, I am not accepted and illegal, I need to be refilled from time to time and i can harm my owner. What am I?

Choose an answer

A.A knife
B.A bomb
C.A poison
D.A gun
Hint: It's a 2-word phrase with 4 letters, starting with "A".

Answer

A gun

Why this is the answer

This weapon needs ammunition reloaded periodically and is dangerous even to the person carrying it.

This riddle is filed under Time, Money, Music Riddles and rated Medium.