Officers carried out a number of targeted raids on three properties in relation to a drugs gang.
Five people were arrested and weapons, ammunition, mobile phones, and over one thousand wraps of cocaine seized.
One man has been charged in connection with the investigation and the four others bailed.
Superintendent Luke Mooney, Merton Neighbourhood’s Lead, said: “This incredible achievement of the collective neighbourhood team will have a profound impact on the quality of life for people in Mitcham.
“The teamwork across departments including local Proactive, Community Support and Neighbourhood Officers, Specialist Crime, National Police Air Service, and Dog Units was one of the best collaborative efforts I have seen in my career.
“The team courageously put themselves in harm’s way to keep the public safe in an excellent example of the wider Met leaning in to support community crime fighting.”
Inspector Kevin Chambers, who helped lead the operation, said: “I am incredibly proud of my officers and staff for their ongoing commitment and resilience to reducing crime and building trust.
“These warrants have removed firearms and drugs from our community which we know fuels the violence on our streets and has a devastating and lasting impact on victims.
“The officers involved are to be commended for their dedication and bravery, which has resulted in making Mitcham a safer place.”
