The Beretta Cx4 Storm is a pistol-calibre semi-automatic carbine aimed at the sporting, personal defense and law enforcement markets.

[1] It is capable of fully automatic fire, features a 12-inch barrel, and is most commonly seen with a 30-round 9mm magazine that is compatible with Beretta 92 pistols.

The firearm also has some ambidextrous features, such as being able to switch the fire selector, charging handle, ejection port and magazine release to the left side.

The restricted class firearm had been acquired legally, and a coroner's inquest into the shooting recommended that all semi-automatic rifles be banned in Canada.

Sales of the CX4 Storm increased in Canada following the shooting,[5] and in 2011, Beretta introduced a non-restricted (19" barrel) variant of the Cx4, making it more accessible.