Guns and a machete were used to threaten friends in an aggravated burglary in Mossdale Court on Saturday.
The three friends had been enjoying a night in when they heard someone at the front door at about 10.25pm.
When the victim answered, a group of six men burst in and held a machete to his throat.
One of the men struck him in the face with a handgun and the burglars threatened the group.
They fled the flat with two mobile phones and an iPod.
Det Con Tim Worden said: “This was a terrifying attack on a group of young people who were enjoying a Saturday night in and I urge anyone with information to come forward as quickly as possible.
“Please don’t dismiss your information as unimportant, small or insignificant – even tiny details which don’t seem relevant now might become useful later on in the investigation.”
If you have information relating to this incident, contact Det Con Worden, in confidence, on 01582 394434, the non-emergency 101 number, or text information to 07786 200011.
Alternatively contact independent charity Crimestoppers, anonymously, on 0800 555 111, or online at crimestoppers-uk.org.