How awesome would it be to take out a tank as bullets pinged off of the shields of you Pak 38, only to be taken out by a marksman as you frantically loaded another shell? Are there any mods that offer antitank cannons?

I think it would be a really interesting balance, and maybe more true-to-life (at least common) than current in-game antitank rifles. Whoever crewed the gun would be vulnerable and of limited anti-infantry support, but provide real long-range threat to tanks.