Can you Suppress a 50 caliber enough to shoot indoor?

You’re probably thinking “no way”, but Youtuber Eric of IraqVeteran8888 shoots one indoor.
It just goes to show, there seems to be no firearm that can’t be fitted with a suppressor these days.

It’s hard to tell from a video exactly how much quieter this suppressor (Aklys Hayde) made this rifle. But the fact that Eric was able to fire this 50 caliber twice back-to-back indoor without hearing protection says a lot!

We’re just wondering what kind of extreme suppressor will be built next to top this one!