It's a Bronco. I think your friend is thinking of the M6 survival gun http://www.survival-gear-guide.com/M...val-Rifle.html
Also an all-metal gun. Folds completely in half, instead of coming down. Designed for pilots.
I found a refence to Bronco being a trade name used by Firearms International, in the early 70s, for single shot rifles and shotguns. Don't know if that is the manufacturer, 'cause there was no picture with my reference.
Update. Just found this. https://www.midwayusa.com/guntecdict...ng?TermID=2547
Made in Italy, and imported by Garcia.