Police have traced a man from Galashiels after videos of people wearing balaclavas and pretending to fire weapons were posted on YouTube.
The footage showed the men brandishing a range of guns
Officers have questioned a 32-year-old man in connection with the incident, filmed near Selkirk and Galashiels.
The man has not been charged but police have described his actions as an "ill-judged publicity stunt".
Imitation weapons have been recovered. Police said the circumstances would be reported to the procurator fiscal.
Two five-minute films were posted on the video website showing men and women at different locations in the Borders.
The videos - Spree Killers and Chav Killers - showed rappers, wearing balaclavas and sunglasses, apparently firing guns and setting off explosions.
Locations used included Langlee, Bannerfield, and the ruined St Mary's Church.
A police spokeswoman said that carrying guns - whether real or replica - could constitute an offence if done in a public place and considered to cause "fear and alarm".
Both national anti-gun campaigners and local parents have condemned the videos as "offensive".