Looks like a TT-33; semi-auto, old, 7.62/25 with a lot of penetrating power.
It's a Stechkin. Some hardos with Spetznaz sometimes keep it around with a shoulder stock because it's capable of full automatic fire. 9mm.
Has a reputation for jamming on full auto so a poor choice if you don't know what you're doing.
He might have held them off with an AKS with a folding stock and a few mags long enough to be rescued.
It's actually a Stechkin machine pistol, chambered for 9mm Makarov.
https://en.wikipedia.org/wiki/Stechkin_automatic_pistol
“” “” Looks like a TT-33; semi-auto, old, 7.62/25 with a lot of penetrating power.”” “”
That’s APS. It was standard issue for Soviet tank and aircrews between 1950 and mid 1970s then phased in favor of short AKs. Brought back from storage for special operations and aircrews in mid1990s.