Heavy · 45 ACP
A 1920s Thompson-style drum-fed submachine gun added with the Valentine's Day Massacre Special — Prohibition-era aesthetic with full-auto firepower. Sold at Ammu-Nation thereafter.
The Gusenberg Sweeper is a submachine gun (categorized as a light machine gun) that is available in Grand Theft Auto V, and was initially available in Grand Theft Auto Online as a time-restricted weapon from February 13 to March 3, 2014 in the The Valentine's Day Massacre Special pack, and later re-released indefinitely on all platforms as part of the Be My Valentine update.
The Gusenberg Sweeper is based on the .45 ACP (popularly known as the "Tommy Gun"), which is famous for its role in 1920s gangster culture and in the . The name of the weapon is a parody to The Trench Broom and the Chicago Typewriter, two informal names of the Thompson Submachine Gun. The stock is derived from the later M1 & M1A1 Thompson, used during World War II. The Gusenberg Sweeper in-game is fitted with a drum magazine (that holds 30 rounds by default), which is also a common trope in mobster culture. The wooden handguard and stock are noticeably discolored due to wear and tear.
Even though it is a submachine gun, it is classified as a light machine gun and such, it is placed with the MG and the Combat MG, possibly due to its sheer size (much even larger than the SMG).
In the Xbox One, PlayStation 4 and PC versions, the Sweeper's firing and reload sound effects sound lower in pitch when using the first person camera mode.
