Colt Double Action Revolvers top. 1877 Lightning 1878 Frontier 1889 Navy 1892, 94, 95, 96, 1901, 03, New Army & Navy Models 1905 Marine Corps Army Special & Officer's Model Bankers Special Camp Perry Model Cobra, Aircrewman, Courier & Agent Commando Detective Special Diamondback MK III, Lawman., Metropolitan, Official Police 1969 - 1978. May 26, 2010 Hi All, I;ve just acquired a Colt Det. Spl, in.38 Cal. I'm looking for the serial number but cannot find it. There is a bit of rust so opening the cylinder is not yet possible. I was told the gun is approx. 40 years old.

COLT AGENT COLT AGENT 'D' FRAME The Agent was basically the early Cobra, only made with a special short grip frame. The Agent was intended to be a highly concealable undercover revolver with a minimal grip to aid concealment.

It was available in blue or nickel finish, and in.38 Special. The blued guns had blued steel parts and blue-black anodized aluminum frame and cylinder crane. In 1982 the Agent finish was changed to an unpolished flat matte black. Barrel length was 2 inches. Grips were checkered walnut made to slightly overlap the bottom of the short grip frame, or smooth wood.

The First Issue model This had the same thin barrel and exposed ejector rod of the Cobra and Detective Special of that era. It was first issued in 1955 and made until 1972. In 1966 Colt changed all 'D' frames to the same short grip frame as the Agent in order to simplify production. After that, the Agent was the same gun as the Cobra, only with the Agent barrel stamp and using a shorter wood grip. The Second Issue Was made from 1973 to 1991. This version had the new heavy, shrouded ejector rod barrel introduced in 1972 on the Detective Special and Cobra, but still used short grips. The finish was a matte black after 1982.

Mikro Prism Serial Number on this page. Some of these Agents were shipped with Colt factory installed hammer shrouds. POST 1972 HEAVY, SHROUDED BARREL COBRA WITH FACTORY HAMMER SHROUD The tip of the hammer is exposed so it can be cocked.