That's his main personal weapon, an STG44. He also carries a S&W 1917 in a tanker holster. At least I'm pretty sure it's a Smith, could be a Colt but I don't recall getting a good enough look at the cylinder latch or ejector rod to tell.
Of course, when he's using it there is some other stuff going on on-screen so your attention is generally directed elsewhere...
Yep, it's a Smith. I got a good look at the cylinder latch when it was on the table.
