Through a Telegram channel called Oaken Hearth, members exchanged horror manuals, shared racist ideology and posted videos of atrocities, including the mass murder of Christchurch Mosque, jurors were told during a trial of 11 weeks.
A covert police officer infiltrated the group, prompting all four members to be convicted of a total of 18 crimes in March.
A partially printed 3D gun was found in the home of Hill Top Walk, Keighley, two of the group, Liam Hall, 31, and his partner Stacey Salmon, 30.
Salmon.
Examination by a specialist confirmed that, despite being incomplete, the weapon could have proved lethal if fully assembled.
Other weapons of the gang were also recovered, as well as chemicals, practical guides for making explosives and far-right texts and videos.
Living room.
Daniel Wright, 30, of Whinfield Avenue, Keighley, was convicted of seven felony counts, including a crime of making a firearm against him, and was jailed for 12 years in Sheffield Crown Court.
Hall was convicted of a felony of making a firearm and possession of a firearm and was jailed for six years.
Wright.
Salmon was convicted of possessing a firearm and was imprisoned for three years.
Samuel Whibley, 29, of Derwen Deg, Menai Bridge, Anglesey, was convicted of eight terrorism offenses, including the promotion of terrorism and the dissemination of a terrorist publication, and was jailed for 10 years.
Whibley.
When the trial began in January, prosecutor Annabel Darlow QC said the defendants were members of an “extreme fascist” cell during the first four months of 2021.
Following the sentencing, Chief Superintendent of Temporary Detective Peter Craig, Chief of the Northeast Terrorism Police, said: “We are working tirelessly to identify people who have an extremist mindset and threaten the security and unity of the our diverse communities.
“Anyone who is engaging in terrorist activities or violent extremism in any form can expect to be identified and brought to justice.”