JUMP IN THE FIRE

https://www.discogs.com/release/2500314 ... t-It-Loose

I saw this on Facebook today. Does someone has the audio rip or knows if it's really from their first gig?

Recording of that date doesn't exist.

Agreed. There is no known recording of that show.

These two tracks are from the audition tape the band recorded on March '82 at Ron's Garage to get the support slot at Saxon's gig at Whisky on March 27, 1982. So, they are definitely not from March 14th which is Metallica's first gig.
In 1996, Ron stated at an interview at Shockwaves:
"On the 4-track TEAC we recorded a demo of three songs: Hit the Lights , Killing Time (from the Irish band SWEET SAVAGE), and Let It Loose (from the British band SAVAGE). We had heard that Saxon was gonna be playing the Whisky in Hollywood. So I went over to the club with our demo, and as I was walking up, I run into Tommy Lee and Vince Neil from Motley Crue (who I was taking pictures for at the time.) They said 'Hey Ron, what's up?'. I told them that Saxon was doing a gig at the Whisky and I wanted to try to get my band to open up for them. They said, 'Yeah, we were gonna open up for them but we're getting too big to open. Come on in and I'll introduce you to the chick that does the booking'. So I dropped off the tape and she called me back the very next day, I remember her telling me, 'You guys are pretty good... you remind me of this local band called Black'n'Blue. Anyway, she said 'Saxon is scheduled to play two nights; we're gonna have RATT open for them the first night and your band can open the second night'. So we actually have Motley Crue to thank for getting us that gig, which was a major break for us back then. It was Metallica's third show. We actually played two shows that night opening for Saxon."