One of the semi-automatic assault rifles that can be used in the Multiplayer Mode of Call of Duty: Black Ops, is the M14, a weapon which also appears in Call of Duty 4: Modern Warfare. Mahalo’s Video Games Team recorded a video which shows how to get 30 kills, without dying while playing Call of Duty: Black Ops against other players. The video was published on YouTube on December 28, 2010 and was well received by viewers, since it also shows several strategies that can be used by other players.http://callofduty.wikia.com/wiki/M14

The M14 costs 2000 CoD points and has moderate penetration as well as a magazine capable to hold 20 rounds. Players can opt to attach the Extended Magazine which increases the magazine’s capacity to 30 rounds. If the player uses the Grip attachment and the ACOG Scope, the M14 can be compared with a sniper rifle. While the M14 is a redoubtable weapon in medium and long range fights, players will observe that in close quarters this weapon isn’t the best choice, unless they use the proper attachments. One of them is the Flamethrower which can be purchased for 1000 CoD points, and the other is the Masterkey which also costs 1000 CoD Points. http://callofduty.wikia.com/wiki/M14

The Masterkey is an attachment that acts similar to a pump-action shotgun. It is available for most assault rifles from Call of Duty: Black Ops. It has a fire rate of 128.5 rounds per minute and low penetration. To reload it the player needs 0.7 seconds per shell, and this attachment can carry up to 4 shells. http://callofduty.wikia.com/wiki/Masterkey

In the video above, players can observe how a Mahalo gamer kills 30 enemies in Call of Duty: Black Ops, without being killed. The player uses only the M14 rifle and explains the strategies he used while playing the match. This video also reveals what attachments should be used with an M14 to defeat the opponents faster in the Multiplayer Mode.