At our DoD sponsored club in Maryland, we had an older gentleman who owned a Lewis gun. He would show up at the shoots wearing the odd bit of British uniform. Funny, as the Lewis gun was developed by an American.
The Army Ordnance Branch, another of the esteemed "we've done it this was for 100 years" groups refused to entertain the guns for use, so the man went to Belgium, opened a plant, and the British adopted the gun for their use. Of course, when America entered WWII, we essentially, had ZERO machine-guns, light or heavy. Thank you brainless bureaucrats.
First, we equipped our troops with the French Chauchat, one of the historically worst MGs ever conceived, much less adopted. Then, of course, we "discovered " the Lewis gun. Being from Europe now, the same idiots who didn't like it in 1911-1912 enthusiastically accepted it. Ever wonder how many American soldiers died for that hypocrisy?
The gun soldiered on in British hands until after the Korean War.
The member's example was made at the end of WWII production. It was odd-looking by today's standards, and fired the rimmed .303 Brit round. However, it was hell for stout, never seemed to break, and even chewed through Pakistani .303.