Previously Convicted Felon Sentenced to 66 Months for Illegal Possession of a ‘Giggle Switch’ Modified Glock

WASHINGTON - Robert Calvin Corbin III, 45, a previously convicted felon residing in the District, was sentenced on October 9 in U.S. District Court to 66 months in prison in connection with illegal possession of a Glock 9 mm pistol that had been modified with a "giggle switch" to fire as a machine gun, announced U.S. Attorney Jeanine Ferris Pirro.

Corbin pleaded guilty July 1, 2025, to unlawful possession of a firearm and ammunition by a felon. In addition to the 66-month prison sentence, Chief Judge James E. Boasberg ordered Corbin to serve three years of supervised release.

According to court documents, on March 21, officers from the Metropolitan Police Department were called to the 100 block of Q Street NW to investigate a report of a large group of individuals gambling with guns present.

As the officers arrived at the scene, Corbin allegedly was smoking marijuana and drinking tequila from a red plastic cup. An officer stopped Corbin for public consumption of marijuana and possession of an open container of alcohol. As the officer conducted a pat down, the officer felt a hard object in Corbin's waistband and asked what the object was. Corbin responded, "nothing," then allegedly attempted to shove the officer's hands away. The officer and Corbin struggled. Police eventually cuffed Corbin.

Officers recovered from Corbin's waistband a Glock 19 equipped with a laser sight. The pistol was loaded with one bullet in the chamber and an additional 19 rounds in a large-capacity magazine. The firearm had been modified with a "giggle switch," a small device which converts a traditional handgun into a fully automatic machine gun. Officers also recovered from Corbin's bag a second large-capacity magazine with an additional 17 rounds of ammunition.

Corbin was prohibited from possessing a gun due to over twenty-five years of criminal history, including two prior convictions for illegal possession of a firearm.

The Metropolitan Police Department investigated this case with valuable assistance from the Bureau of Alcohol, Tobacco, Firearms, and Explosives, Washington Division. It was prosecuted by Special Assistant U.S. Attorney Emily Reeder-Ricchetti.

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Editor's Note:
This matter occurred on date indicated but not published at that time due to government shutdown. Press release posted and made available following the return to normal operations.