Tawana Blake, a resident of A north London, has been jailed for six and a half years at the Old Bailey on Thursday.
The 32 year old mum was paid to hide two deadly guns and she was caught after police spotted her giving a teenager a large bag filled with a shotgun and cartridges at her home on Ealing Road in Wembley.
Police who were at the time tracking the teenager watched him arrive at Tawana's home and he was nabbed as he left the scene in a minicab.
Officers then raided Blake's house and found a handgun as well as cocaine. Also sentenced was Robert Hewitt, 43, from Connaught Road in north London, who was jailed for 11 years after his fingerprints were found on the smuggled shot gun.
The teenager, a 16-year-old who cannot be named for legal reasons, was jailed for four and a half years for unlawful possession of a firearm and ammunition after being found guilty.
Blake and Hewitt were both found guilty of conspiring to transfer a prohibited weapon on August 26. Blake also pleaded guilty to unlawful possession of a firearm and ammunition and possession of class A drugs.
Detective Inspector James Newcome, from the Trident North Proactive unit, said: "My unit are determined to take these lethal guns off the streets of London and I am delighted that these three people are now behind bars.
“The storing and moving of a deadly weapon is a serious criminal offence and the consequences are severe. I sincerely hope this sentence will deter others from similar offending and think twice before getting involved. “Trident is committed to relentlessly pursuing those who carry and supply firearms and blight the communities we serve."