Smith & Wesson increased scrutiny due to the frequent use of its firearms in mass shootings such as the 2018 Stoneman Douglas High School shooting, in which 19-year-old Nikolas Jacob Cruz used a Smith & Wesson AR-15 style rifle, the semi-automatic M&P15. The same weapon was used in the 2015 San Bernardino attack and the 2012 Aurora shooting. Smith & Wesson has produced revolvers over the years in several standard frame sizes. "M" refers to the small early Ladysmith frame, "I" to the small .32 frame, "J" to the small .38 frame, "K" to the medium .38 frame, "L" to medium large, and
Smith & Wesson .38/44 either blue or nickel finish. Production was interrupted by the second world war. Postwar production serial numbers are prefixed with the letter S. After the war these N-frame revolvers were popular with veterans experimentally handloading the .38 Special at pressures up to fifty percent higher than the recommended for conventional .38 Special revolvers. In 1957, the "Heavy Duty" fixed sight version was marketed as the Smith & Wesson Model 20 and the "Outdoorsman" with adjustable sights became the Smith & Wesson Model 23 Smith & Wesson .38/44 Smith & Wesson .38/44 identifies a series of 6 shot, double-action, Smith &