"When Omar Mateen burst into Pulse nightclub in Orlando on June 12 and opened fire on the crowd, killing 49 people and wounding 53 others, he was armed with two guns. But in the aftermath of the attack, only one of the weapons became the subject of intense scrutiny. Most of the attention has focused on Mateen's semi-automatic .223-caliber Sig Sauer MCX, which is modeled after the AR-15 assault rifle. The fact that similar weapons were used during several recent mass shootings — including the 2012 massacre at Sandy Hook Elementary School in Connecticut, the movie theater rampage in Aurora, Colorado that same year, and the 2015 attack in San Bernardino, California — led to a renewed push for an assault weapons ban, and prompted many reports about how easily AR-15s can be purchased in Florida. But Mateen was also carrying a Glock, a brand of firearm that has been used nearly as often as assault rifles to commit mass murder. A list of mass shootings between April 1999 and January 2013 prepared for lawmakers in Connecticut showed that rifles were used in 10 incidents and shotguns in 10 others, while handguns were used in 42. Glock brand pistols turned up in nine of those cases. Another compendium of mass shootings since 2009 by the New York Times showed that handguns were used in 13 incidents, compared to five in which a rifle was the primary weapon. Glocks were recovered from six of the perpetrators.... The earliest known case of a Glock being used in a mass shooting came in 1991, when unemployed merchant mariner George Jo Hennard drove his pick-up truck through the plate-glass window of Luby's Cafeteria in Killeen, Texas. Hennard exited his vehicle and methodically fired two pistols, including a Glock 17, at restaurant patrons, killing 24 and injuring 27. In the last nine years, Glocks have figured prominently in at least five mass shootings. In 2007, Seung-Hui Cho, a senior at Virginia Tech University, used a Glock 19 and Walther P22 to kill 32 people and wound 17 others in two separate attacks on campus. The Glock 19 is a smaller pistol that is easier to conceal. Three years later, Jared Lee Loughner used a Glock 19 to shoot 20 people in Arizona, gravely wounding US Representative Gabrielle Giffords and killing six others, including a nine-year-old girl. In 2013, Pedro Vargas went on a shooting rampage inside his apartment complex in Hialeah, Florida. With his Glock 17, Vargas murdered six people and held two neighbors hostage during an eight-hour stand-off until a SWAT team stormed the building and killed him."