Little used but great weapons?

[stormbringer3]

I recently started a long campaign with a German infantry focus starting date 8/44. There was a recent post describing how good the Stlgr 42 PAK 38 worked, especially for ambushes. I have been impressed with how well this works. If it wasn't for that post I never would have considered using this particular ATG. I'm thinking that there must be other weapons that are very good but get little notice. I would appreciate any ideas on other weapons to try!
Thanks.