Detailed Instructions: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Q: Lt. Colonel Hal Moore: I think you oughta get yourself an M-16 .
Sergeant Major Basil Plumley: Sir , if the time comes I need _ one _ , there 'll be plenty lying on the ground .
A:
M-16