Nine members of the gang were sentenced at Birmingham Crown Court.
This followed the sentencing of six men, including Nosakhere Stephenson - described by police as the mastermind - yesterday.
The ring was uncovered by a surveillance operation carried out by West Midlands Police in 2014.
Eight guns, including a pump action shotgun and a Mach 10 Machine pistol, were recovered from premises in Great Barr and Handsworth - with one taken from a car in Hockley as it was being handed over to a buyer.
Another three men - Darren Mentore, 34, of no fixed address; Clinton Officer, 32, of Wallflower Street, Shepherds Bush, London; and Jamal Shaka Smith, 34, of Ladywood Middleway, Birmingham - await sentencing in January.
Joynal Abdin, 26, of Hanover Close, Aston, Birmingham was found guilty by a jury and sentenced to 7 years 3 months in prison.
Mohammed Fedar, 27, of Westfield Road, Smethwick: 4 years 4 months
Amar Ghalib, 32, of Davey Road, Perry Barr, Birmingham: 4 years 11 months
Usman Hussain, 31, of Brays Road, Sheldon, Birmingham: 5 years
Ifran Hussain, 25, of Underwood Road, Handsworth Wood, Birmingham: 10 years 10 months
Joga Mattu, 31, of Cranbrook Road, Handsworth, Birmingham: 5 years
Mohammed Selu Miah, 24, of no fixed address: 13 years
Janed Mohammed, 21, of Dibble Road, Smethwick: 4 years 6 months
Mohammed Ullah, 19, of Frederick Road, Aston, Birmingham: 5 years
Nosakhere Stephenson, 41, of St Michael's Road, Handsworth, Birmingham: 16 years 6 months
Sundish Nazran, 32, of Nijon Close, Handsworth, Birmingham: 13 years
Rowan Gul, 33, of Reginald Road, Alum Rock, Birmingham: 12 years 3 months
Theodore Junior Wiggan, 28, of Scaffle Way, West Bromwich: 10 years
Louis McDermott, 36, of no fixed address: 9 years 4 months
Fitzroy Ducram, 50, of no fixed address: 7 years 4 months
Ch Insp Simon Wallis, from West Midlands Police's serious and organised crime unit, said the convictions were a "fantastic" result for a lengthy operation.
"We've put some prolific criminals behind bars who have been responsible for bringing dangerous weapons to our city," he said.
"It is no exaggeration to say each and every gun or bullet that we've seized represents a life potentially saved."

The men - all in their 20s - "forcibly entered" the flats in Bannockburn Road at about 0200 on Sunday.
One of the men was 6ft 3in tall with a muscular build and wearing a dark hooded top. Another also had a dark jumper or hoody on.
Police have appealed to anyone with information to contact them.
Officers said the assaults were unprovoked.

Every year hundreds of thousands of children see domestic abuse at home and it can happen to anyone.
Alesha Dixon tells her story to Newsround, along with children who have experienced it first-hand themselves.
We also see CBBC presenter Barney Harwood discover how widespread the problem is, when he spends time with a police unit responding to 999 calls.
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Police are hunting three men who broke into flats providing shelter for the homeless and carried out a series of assaults.
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Behind Closed Doors explores the rarely talked about issue of children witnessing domestic violence.