A Kingston College student who sneaked a semi-automatic pistol into lessons was jailed for five years this morning.

Adamo Kizey, 18, who raps under the name StabsOneShot, smuggled a Baikal IZH-79 pistol in his jacket, and six rounds of ammunition in his outer pocket.

Police suspected the former Coombe Boys School pupil was a drug dealer and came to the college on February 2 this year to search him.

When they took him into a side room and asked him if he had anything on him, he said: "No."

But officers found the semi-automatic pistol and arrested him.

A later search of his house in Cambridge Gardens, Kingston, with sniffer dogs, revealed wraps of cannabis in a jacket pocket, a silencer hidden in a white sock at the bottom of his wardrobe and a set of digital weighing scales.

Police also found "quite disturbing" handwritten notes which made reference to stabbing, an earlier hearing heard.

Kizey also used social networking sites Myspace, Bebo and Facebook to promote his music.

One song included the lyrics "I can be evil at times. If I could control my anger I would be a serial killer, I swear bro look", and "If you get to scream my name you see satan. I'm wall-to-wall threats. My name's Stabs."

At first he claimed he had found the gun and did not know what to do with them, but did not want to leave them at home near his brother.

But he later admitted his guilt.

His mother Zizi Tendeni told the Surrey Comet in August at the time of her son's guilty plea she searched his room every week because she was worried he was hanging around with "bad people" but had never found any drugs or guns.

She said he had been in trouble before when he was 12 for spraying graffiti on a bus and was fined £100 and sentenced to community service for his part in the theft of a mobile phone.

At Kingston Crown Court this morning, Judge Recorder Oliver said he believed Kizey was a danger to the public as he jailed him, and said he must serve at least two-and-a-half years of his five year sentence before he is eligible for parole.

He will remain on licence for the rest of his life.

In a statement issued after the sentencing, principal Peter Mayhew-Smith said it was now working with police to raise awareness of youth crime with a drama called Boy X to persuade young people not to be pressured into a life of crime.

He said: "We will continue working with the police to ensure students are educated on crime related issues."

Detective Chief Inspector Peter Beyer said in a statement: "This student was carrying a firearm on college property which posed a significant safety risk to students and teaching staff, as well as the wider community.

"Officers from the Metropolitan Police's task force carried out a successful, targeted and discreet operation which has removed another gun from the streets of London."

Baikals are a favourite weapon in the criminal underworld because of their light weight and size.

They are converted from firing CS gas pellets into live rounds.

New Malden teenager James Andre Smartt-Ford, 16, was killed at Streatham Ice Rink in 2007 by a Baikal, although there was no suggestion Kizey's gun had ever been used.