The U.S. military was re-issued the 1911 pistol in 1924, now designated the M1911A1. Changes to the gun included a larger ejection port, a shortened trigger, a longer grip-safety spur and slightly shaved hammer spur to prevent hammer bite, serrated front sight, a curved mainspring housing, simplified checkered grips (although diamond grips still appeared on some), and relief cuts around the trigger guard on the frame. Browning sold the pistol design to Colt, the first major company that would market the handgun. During initial testing in the military trials, the M1911 fired 1,000 rounds flawlessly, becoming the first self-loading pistol to pass with a 100% grade. It was the official pistol of the United States military from 1911 to 1985, when it was replaced by the Beretta M9. It is often regarded as the best pistol ever made by gun enthusiasts, and is still popular today, so the weapon is still being produced. Although it was replaced by the M9, the 1911 is still used by some units in the Navy, Marines and Special Forces, as accurately demonstrated in Under Siege.