"High Capacity Magazine"

These Magazines hold 10 Rounds of ammunition .

At Virginia Tech, the shooter killed 32 people and wounded 17 with guns equipped with high-capacity magazines. These magazines enabled Seung-Hui Cho to commit the worst mass shooting in U.S. history.

"High Capacity Magazine Not an issue, National Rifle Association"

In Aurora, Colo., a high-capacity magazine made it possible for the gunman to shoot 70 people, killing 12, in only a few minutes. His 100-round drums jammed. Imagine how many more lives would have been lost had the drum not jammed.

The National rifle association contend high capacity magazines are not an issue , The  high capacity  magazine  pictured  here would allow a perpetrator in a Movie Theater , School or Shopping Mall to disperse 60 rounds or more in less than 30 seconds. If a criminal , someone suffering from a mental unstable condition  or just someone who mindlessly want to do harm has access to magazines with say ten rounds, how much less harm would he be able to do?.