A West Virginia man who was accused of selling machine gun conversion devices to followers of a far-right extremist movement received a five-year prison sentence Wednesday.

Timothy John Watson pleaded guilty in March in federal court in Martinsburg to possession of an unregistered firearm silencer.

Three other charges against Watson were dismissed. As a part of a plea agreement, Watson was ordered to forfeit the silencer, 3D printers and parts along with items seized in a November 2020 search that prosecutors said are devices used to convert semi-automatic AR-15 rifles into fully automatic machine guns.

Prosecutors said Watson, 31, of Ranson, made and sold hundreds of the devices to nearly 800 people online. Some of those included supporters of the anti-government “boogaloo” movement, the code word they use for their talk of a second civil war. Their prominence has grown during the pandemic as the gun-toting supporters, many dressed in Hawaiian shirts and camouflage garb, attended protests against government shutdowns.

Read more: CBS Pittsburgh