Interestingly, then Major George Chin, U.S.M.C., who wrote what was described as "the seminal work on machine guns", though today it might be somewhat dated, offered the following on machine guns and their development. "The government never produced a decent machine gun".
The Major Chin was an acknowledged expert, who most laudably of John Browning. Seems that Mr. Browning did his weapons development work with nary a bit of government support. I believe that he offered his designs to the U.S. Government free of charge, without payment of any loyalties.
Among other things that Browning might have been described as would, I think be, a loyal American.