by Olympic Arms . . .
At least no injury.
Had a .50cal Browning come into my small arms repair shop when I was in Vietnam.
The cav. unit in our area brought in one their 50's.
Person FORGOT to set the headspace when replacing the barrel. It CAME apart...
cover went thru the persons head, sides of the "frame" were badly buldged out and parts were missing.
Taught me to always double check haedspace and timing whenever I test fired one!!