Two Brent gang members who fired random gun shots at a crowd outside a nightclub will have to spend a total of 27 years in jail between them.
Brenton Dias, 23, from Stafford Road, Kilburn and George Booth, also 23, from Grand Avenue, Wembley, were convicted of four counts of wounding with intent to supply and one charge of possessing a fire arm with intent to endanger life.
The main gunman has not been caught but police used CCTV images to catch Dias and Booth.
Eleven men in total left an estate in South Kilburn and drove to Luton in expensive cars to attend a student union charity event at The Lounge Bar in November 2006.
Four people received gun shot wounds outside the bar but no-one died.
DCI Irene Meegan, senior investigating officer, said: "This was a shocking and extremely violent incident involving a firearm, which is not the sort of thing you would expect on a night out. The people of Luton expect to be able to go out at night and enjoy themselves and not face the level of violence demonstrated on that night.
"The investigation into this gang by a small but extremely dedicated group of officers all over the UK and it has taken 18 months to see the offenders brought to justice."
Dias was sentenced to 14 and a half years and Booth was sentenced to 13. Dias, who is also serving a sentence for supplying heroin and crack cocaine, was told he must serve a minimum of seven and a quarter years before he can apply for parole.