Trotskygrad PM'd me asking what weapons I had in mind, I'll post my reply here since it's relevant:
Off the top of my head:
Soviets - PPD-40, M38, PTRD-41, DT-29, RGD-33
Germans - s.MG 42, MG 26(t), P.08, PzB 39, Geballte Ladung, M 24 with frag sleeve, possibly the Gw 98 sniper variants although I'm not 100% sure they were used in Stalingrad.
This is without even bringing the Italians and Romanians into the equation. If TWI truly wanted to, they could make RO1 look like a barren wasteland compared to the amount of content that would fit - historically accurately - in RO2.
That's not an exhaustive list, that's just me pulling the most prominent examples out of my head and writing them down.
I've also come up with an idea for the s.MG 42 to keep it from being too much of a murder machine. There are a couple of ways to set up an LMG; on its bipod in the true LMG role, on a fixed facing using simple stakes (we used steel star pickets often used for wire fences), on a fixed arc (also using stakes), or on a tripod as an HMG, usually with an optic of some sort and generally used for plunging fire or setting up a beaten zone 800-1,000m away.
My idea is that if the s.MG 42 enters into the game set up on a fixed facing, but one where it's useful (i.e. a clear field of enfilade fire), it has the potential to cut down swathes of dudes, but it can't suddenly be swung around to defeat another attack in a completely different direction. Fixed facing MGs are used to cover the most likely enemy approach, hence their fixed nature, and fire from the enemy's flank where an MG is most effective.
Thoughts?