ST. LOUIS • The St. Louis Police Department is selling a stash of guns that bring to mind Prohibition-era gangsters for cash to put new a handgun in every officer’s holster, plus arm the department with a number of AR-15 rifles.

The rifles and about 1,525 new 9 mm Beretta handguns will be paid for largely by the sale of 27 Thompson submachine guns, some dating to the 1920s. The proceeds from the vintage weapons will cover about half of the new arsenal — the first shipment of which is expected to arrive in August. The sale of the Berettas currently used by officers and other surplus weapons will make up the rest.

St. Louis decommissioned its Thompson submachine guns about 60 years ago. They have been stored in a basement bunker inside the police academy ever since. The guns, more commonly known as Tommy guns, were often the weapon of choice among gangsters during the Roaring ’20s and the 1930s, but they were also carried by lawmen of the time. In later years, FBI agents carried them.