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Your description sounds like the Soviet PPSh-41 https://the-wolfenstein-fanon.fandom.com/wiki/PPSh-41
. I've only played the original Wolfenstein so can't be sure of which game it's in. Someone has posted a walkthrough of Return to Castle Wolfenstein on YouTube using the weapon, https://www.youtube.com/watch?v=SDGYEFPlzO8
, but this may be a user developed mod.
Going by the wiki, there's fourteen different guns that can be dual-wielded
in the series. I'm not sure which one fits this description though.
Until next time...
Anon e Mouse Jr.
If you're responding directly to one of my posts, please ping me to make sure I see it.^ The Maschinenpistole
looks like what I'm talking about. The drum mag is apparently an upgrade.

There's already a heap of Wolfensteins out there so I kind of lost track which one is about what.
In which installment one of the weapons you can possess, is a drum-magazine submachinegun which can be Guns Akimbo-ed? The smg itself looks like an oversized TEC-9 crossed with MP-40 and its barrel has a "heatsink" with round holes.