 Although the money was allocated for 1964, the DRB managed to delay delivery for ten months, forcing McGill to cover salaries in the interim.These problems did not go unnoticed in the US Army, and in order to ensure that firings would not be interrupted by problems on the Canadian side, a third double-length gun was built at the Yuma Proving Grounds to continue the high-altitude measurements.On November 18, 1966 this gun launched a Martlet-2 to 180 km, a world record that still stands today.