The Specialist Firearms Command (MO19) is the firearms unit of the Metropolitan Police Service (Greater London, England). The Command is responsible for providing a firearms-response capability, assisting the rest of the service which is not routinely armed. They are full-time units whose members do not perform any other duties. On occasion, they have been referred to as the "blue berets", as they used to wear these. Today they are more likely to wear either blue baseball caps or combat helmets. Historical use of firearms At its formation in 1829, the police service did not routinely carry firearms, but the Home Secretary later authorised the Commissioner to purchase fifty pairs of flintlock pistols for use in emergencies—such as those that involved the use of firearms. As time progressed, the obsolete flintlocks were decommissioned from service, being superseded by early revolvers. At the time, burglary (or "house breaking" as it was then called) was a common problem for police, and "house breakers" were often armed. Due to killings of officers by armed criminals in the outer districts of the metropolis, and after public calls debating whether Peel's service should be fully armed, the Commissioner applied to Peel for authorisation to supply officers in the outer districts with revolvers. The authorisation was issued on the condition that revolvers could only be issued if, in the opinion of the senior officer, the officer could be trusted to use it safely, and with discretion. From that point, officers who felt the need to be armed could be. The practice lasted until 1936, although the vast majority of the system was phased out by the end of the 19th century. In the 1860s, the flintlock pistols that had been purchased in 1829 were decommissioned from service, being superseded by 622 Beaumont–Adams revolvers firing the .450 cartridge, which were loaned from the army stores at the Tower of London following the 1867 Clerkenwell bombing. In 1883, a ballot was carried out to gather information on officers' views about arming, and 4,430 out of 6,325 officers serving on outer divisions wanted to be issued with revolvers. The now-obsolete Adams revolver was returned to stores for emergencies, and the Bulldog 'Metropolitan Police' revolver was issued to officers on the outer districts who felt the need to be armed. On 18 February 1887, PC 52206 Henry Owen became the first officer to fire a revolver while on duty, after being