The "Stinger",...cobbled together from aircraft 1919s (1400 RPM), Garand stocks, and a BAR bi pod.
Only six were ever constructed, all were used on Iwo Jima, and they were presumably abandoned there.
I can see how a guy getting ready to go into combat would start to wonder what could be done to a lightweight, high RPM 1919 that would allow him to use it in battle.
Basically, it's an enlisted man's answer to the MG42.
"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744
I didn't hear him mention how much that Stinger weighed.
My nephew has a reworked Semiauto 1919 that he uses for his Military reenactment group that puts on shows at Camp Maybry in Austin. It’s a heavy SOB.
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"
From what I've read, they could handle the 1400 RPM cyclic rate even with light barrels when mounted in airplanes because of the additional airflow. I'd guess that the barrels were shot out of the Stingers after a couple of days on Iwo Jima.
MG42s have about the same rate but they have a quick change barrel system.