Lockheed said it flew its seventh F-35 Lightning II flight test aircraft for about an hour over Naval Air Station Fort Worth Joint Reserve Base in Texas.
The defense company said the primary objective of the flight was to validate the weapons suite on the F-35.
"This aircraft is configured to test and verify the multiple weapons loads that will deliver fifth-generation combat capability to the warfighter," said F-35 program manager James Sandstrom.
The F-35 is the first in the series to have an internal, four-barrel Gatling gun installed. The 25mm gun system can fire 3,000 rounds per minute.
Testing consisted of gun vibration, acoustic and recoil load analysis.
Lockheed said the F-35 Lightning II combines stealth technology with speeds of up to Mach 1.6 to enhance warfighter capabilities at lower operational and support costs.