While the Lewis gun was the preferred weapon, and appears in some photos of chasers in post-war settings, the Colt was the standard issue, and the model most commonly appearing in photographs of chasers.

A Colt machine gun mounted on the port bridge wing of a chaser. Note also the wheel, partly visible in the pilot house to crewman Edmund Freeman's right, and what appears to be a roll-down door closure. This was replaced with the standard wooden pilot house door.

Colt machine gun
Photograph of Colt machine gun, courtesy of Dave Freeman, son of crewman Edmund F. Freeman.