The M14 is a semi-automatic assault rifle. It can be bought from the wall for 500 points.
Available off the wall for 500 points, the M14 is a useful weapon to use in the early rounds, and is a reliable weapon up to about round 10, where it starts to lack behind other weapons in performance. It is one of the easier weapons to get headshots. The M14 lacks in body shots in medium rounds including round 5, where it takes a whole mag to the body to kill 1 zombie at round 5.
When upgraded it becomes "Mnesia" obtaining a 16 round mag and increased ammo capacity as well as increased damage. It also gains a grip when upgraded and a one-hit kill headshot up until round 13 and reliable for headshots at later rounds if wanting to keep it for point making.