High-Capacity Ammunition Magazines are the Common Thread Running Through Most Mass Shootings in the United States

Columbine shooter armed with Intratec TEC-DC9 assault pistol equipped with high-capacity ammunition magazine

Since 1980, there have been at least 56 mass shootings (3 or more fatalities) where the shooter used high-capacity ammunition magazines. A total of 507 people were killed in these shootings and 497 were wounded. This number is likely a significant undercount of actual incidents since there is no consistent collection or reporting of this data. Even in many high-profile shootings information on magazine capacity is not released or reported.

High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) UPS distribution center 4 dead San Francisco, California MasterPiece Arms (including June 14, 2017 MAC-10 assault 30-round magazine shooter), 2 Shooter: Jimmy Lam pistol wounded High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) House party Mukilteo, Washington 3 dead, 1 Sturm Ruger AR-15 30-round magazine July 30, 2016 wounded assault rifle Shooter: Allen Christopher Ivanov 3 law Tavor SAR assault Baton Rouge, Louisiana enforcement rifle, Stag Arms M4 July 17, 2016 officers dead, 3 variant assault rifle, High-capacity Shooter: Gavin Long wounded Springfield XD 9 ammunition magazines mm semiautomatic pistol

Saiga AK-74 assault 5 law rifle, Glock 19 Gen 4 enforcement Dallas, Texas and Fraser .25 officers dead, 9 Multiple high-capacity July 7, 2016 semiautomatic officers and two ammunition magazines Shooter: Micah Johnson pistols citizens wounded

50 dead Pulse nightclub Multiple 30 round (including Orlando, Florida Sig Sauer MCX magazines, some taped shooter), 53 June 12, 2016 assault rifle together for faster wounded Shooter: Omar Mateen reloading

Glock 19 Kalamazoo Michigan semiautomatic Multiple parking lots 6 dead, 2 pistol, Walther P99 Extended magazine February 20, 2016 wounded 9mm semiautomatic Shooter: Jason Dalton pistol Inland Regional Center Smith&Wesson San Bernardino, California 14 dead, 21 M&P assault rifle, 4 30-round magazines December 2, 2015 wounded DPMS A15 assault Shooters: Syed Farook and rifle Tashfeen Malik Navy Operational Support Center and Marine Corps Reserve Center 6 dead AK-variant assault Chattanooga, Tennessee (including Multiple 30-round rifle, Saiga assault July 16, 2015 shooter), 2 magazines shotgun, handgun Shooter: Muhammad Youssef wounded Abdulazeez

2 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) Emanuel African Methodist Episcopal Church Glock .45 Model 41 Charleston, South Carolina 9 dead 13-round magazines pistol June 17, 2015 Shooter: Dylann Roof Marysville-Pilchuck High School, 5 dead Marysville, Washington Beretta .40 High-capacity, number (including October 24, 2014 semiautomatic pistol of rounds unstated shooter) Shooter: Jaylen Fryberg Apartment complex Hialeah, Florida Glock 17 6 dead 17-round magazine July 26, 2013 semiautomatic pistol Shooter: Pedro Vargas Santa Monica, California 6 dead, AR-type assault rifle June 7, 2013 (including 40 30-round magazines built from parts Shooter: John Zawahri shooter) Sandy Hook Elementary School Bushmaster XM15 28 dead, Newtown, Connecticut assault rifle, Glock (including 30-round magazines December 14, 2012 10mm pistol, 9mm shooter) Shooter: Adam Lanza Sig Sauer pistol Accent Signage Systems 7 dead Minneapolis, Minnesota (including Springfield XDM 2 15-round magazines September 27, 2012 shooter), 3 semiautomatic pistol Shooter: Andrew Engeldinger wounded Sikh Temple 7 dead Oak Creek, Wisconsin (including Glock 9mm August 5, 2012 3 19-round magazines shooter), 2 semiautomatic pistol Shooter: Wade Michael Page wounded

Café Racer 6 dead Seattle, Washington Colt .45 (including Extended magazine May 30, 2012 semiautomatic pistol shooter) Shooter: Ian Stawicki Smith & Wesson Century Aurora 16 movie theater M&P15 assault rifle, Aurora, Colorado 12 dead, 58 .40 Glock 100-round magazine July 20, 2012 wounded pistol, Remington Shooter: James Holmes model 870 12 gauge shotgun

3 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) IHOP 5 dead, MAK-90 assault rifle Carson City, Nevada (including 20- and 30-round (illegally converted September 6, 2011 shooter), 7 magazines to full-auto) Shooter: Eduardo Sencion wounded

Safeway parking lot Two 31-round Tucson, Arizona 6 dead, 13 Glock 19 magazines January 8, 2011 wounded semiautomatic pistol Two 15-round Shooter: Jared Loughner magazines Shreveport, Louisiana August 16, 2010 3 dead Assault weapon 30-round magazine Shooter: Marcus Donte Reed Hartford Distributors 9 dead Manchester, Connecticut (including Sturm, Ruger SR9 17- and 15-round August 3, 2010 shooter), 2 semiautomatic pistol magazines Shooter: Omar Thornton wounded

ABB, Inc. 4 dead Romarm AK-47 Two “banana-style” St. Louis, Missouri (including assault rifle, Tristar high- capacity January 7, 2010 shooter), 5 12 gauge shotgun, magazines (capacity not Shooter: Timothy Hendron wounded Hi-Point .40 pistol stated) Fort Hood FN Five-seveN Fort Hood, Texas 13 dead, 34 30- and 20-round 5.7mm November 5, 2009 wounded magazines semiautomatic pistol Shooter: Nidal Hasan LA Fitness Center 4 dead Two 9mm Collier, Pennsylvania (including semiautomatic 30-round magazines August 4, 2009 shooter), 9 pistols, .45 pistol, Shooter: George Sodini wounded .32 pistol American Civic Association 14 dead 9mm Beretta Binghamton, New York (including semiautomatic 30-round magazine April 3, 2009 shooter), 4 pistol, .45 handgun Shooter: Jiverly Wong wounded Oakland, California March 21, 2009 4 dead SKS assault rifle High-capacity magazine Shooter: Lovelle Mixon SKS assault rifle, Alabama, multiple locations 11 dead High-capacity Bushmaster AR-15 March 10, 2009 (including magazines taped assault rifle, .38 Shooter: Michael McLendon shooter) together pistol

4 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) Walt Lou Trailer Park 4 dead WASR-10 assault Stafford, Virginia (including rifle, Smith & 30-round magazines May 5, 2008 shooter) Wesson .38 revolver Shooter: Aaron Poseidon Jackson Glock19 9mm Northern Illinois University 6 dead pistol, Hi-Point 380, DeKalb, Illinois (including 33- and 15-round Remington12 gauge February 14, 2008 shooter), 21 magazines Sportsman 48 Shooter: Steven Phillip Kazmierczak wounded shotgun Westroads Mall 9 dead Two 30-round Omaha, Nebraska (including WASR-10 assault magazines taped December 5, 2007 shooter), 5 rifle together Shooter: Robert Hawkins wounded

Virginia Tech 33 dead Glock 19 Blacksburg, Virginia (including semiautomatic 15-round magazines April 16, 2007 shooter), 17 pistol, Shooter: Seung-Hui Cho wounded Walther P22 pistol

Mail Processing Plant Smith & Wesson Goleta, California 7 dead 9mm model 915 15-round magazine January 30, 2006 semiautomatic pistol Shooter: Jennifer San Marco Living Church of God 8 dead Brookfield, Wisconsin Beretta 9mm (including 2 13-round magazines March 13, 2005 semiautomatic pistol shooter) Shooter: Terry Ratzmann Hunting Camp Birchwood, Wisconsin 6 dead, 3 SKS assault rifle 20-round magazine November 21, 2004 wounded Shooter: Chai Vang Edgewater Technology Inc. AK-47 assault rifle, Wakefield, Massachusetts 60-round, large-capacity 7 dead 12 gauge pump- December 26, 2000 feeding device action shotgun Shooter: Michael McDermott Xerox Honolulu, Hawaii Glock 17 9mm Three 15-round 7 dead November 2, 1999 semiautomatic pistol magazines Shooter: Byran Uyesugi

5 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) Wedgewood Baptist Church 8 dead Sturm, Ruger P85 Fort Worth, Texas (including 9mm semiautomatic Three 15-round September 15, 1999 shooter), 7 pistol, .380 pistol magazines Shooter: Larry Gene Ashbrook wounded Intratec TEC-DC9 Columbine High School assault pistol, Littleton, Colorado 15 dead Hi-Point 9mm High-capacity April 20,1999 (including Carbine, magazines Shooters: Eric Harris and Dylan shooters), Savage 67H pump- (capacity unstated) Klebold 23 wounded action shotgun, Savage 311-D 12- gauge shotgun Thurston High School 4 dead, 22 9mm Glock Springfield, Oregon wounded semiautomatic 50-round magazine May 21,1998 pistol, Shooter: Kip Kinkel .22 Sturm Ruger rifle, .22 Sturm Ruger pistol Westside Middle School M-1 rifle, Remington Jonesboro, Arkansas 5 dead, 10 .30-06 rifle, various March 24, 1998 wounded handguns 15-round magazine Shooters: Andrew Golden and Mitchell Johnson Connecticut State Lottery Headquarters 5 dead Newington, Connecticut (including Glock 9mm 19-round magazine March 6, 1998 shooter) semiautomatic pistol Shooter: Matthew Beck Caltrans Maintenance Yard 5 dead Orange, California (including AK-47 assault rifle Five 30-round December 18, 1997 shooter), magazines Shooter: Arturo Reyes Torres 2 wounded Piper Technical Center Glock Los Angeles, California 4 dead semiautomatic pistol 19-round magazine July, 19, 1995 Shooter: Willie Woods

6 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) DC Police Headquarters 4 dead Washington, DC (including Cobray —11 assault Extended magazine November 22, 1994 shooter), 1 pistol Shooter: Bennie Lee Lawson wounded Fairchild Air Force Base hospital 5 dead Spokane, Washington (including MAK-90 assault rifle 75-round drum June 20, 1994 shooter), 23 magazine Shooter: Dean Mellberg wounded Long Island Railroad Long Island, New York 6 dead, 19 Sturm, Ruger P-89 Four 15-round December 7, 1993 wounded 9mm semiautomatic magazines Shooter: Colin Ferguson pistol Pettit & Martin Law Offices 9 dead Two Intratec TEC- San Francisco, California (including DC9 assault pistols, 40- to 50-round July 1, 1993 shooter), 6 .45 pistol magazines Shooter: Gian Luigi Ferri wounded

Luby’s Cafeteria 24 dead Sturm, Ruger P-89 Killeen, Texas (including 9mm semiautomatic 17- and 15-round October 16, 1991 shooter), 20 pistol, Glock 9mm magazines Shooter: George Hennard wounded semiautomatic pistol General Motors Acceptance Corp. 10 dead Jacksonville, Florida (including M-1 rifle, .38 30-round magazines June 18, 1990 shooter), 4 revolver Shooter: James Pough wounded Standard Gravure Corporation 9 dead AK-47 assault rifle, Louisville, Kentucky (including 2 MAC-11 assault September 14, 1989 shooter), 12 pistols,.38 revolver, 30-round magazines Shooter: Joseph Wesbecker wounded Sig Sauer 9mm pistol Cleveland Elementary School 6 dead AK-47 assault rifle, Stockton, California (including Taurus 9mm pistol, 75-round drum January 17, 1989 shooter), 30 unidentified pistol magazine Shooter: Patrick Purdy wounded Palm Bay shopping center 6 dead Sturm, Ruger Mini- Five 30-round Palm Bay, Florida (including 2 14 assault rifle magazines April 23, 1987 police officers) Shooter: William Cruse

7 High-Capacity Mass Shooting Incident Casualties Firearm(s) Ammunition Magazine(s) McDonald’s 22 dead Uzi Carbine, San Ysidro, California (including Browning 9mm July 18, 1984 shooter), 19 pistol, Winchester 25-round magazine Shooter: James Huberty wounded 1200 pump-action 12-gauge shotgun Ianni’s Nightclub Smith & Wesson Dallas, Texas 6 dead, 1 9mm semiautomatic Two 14-round June 29, 1984 wounded pistol magazines Shooter: Abdelkrim Belachheb

Pennsylvania, multiple locations 13 dead, 1 AR-15 30-round magazines September 25, 1982 wounded semiautomatic Shooter: George Emil Banks assault rifle

Oregon Museum Tavern 4 dead, 19 Browning 9mm Salem, Oregon wounded semiautomatic pistol Two 14-round May 7, 1981 magazines Shooter: Lawrence Moore

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