There are 2 perfectly viable weapons that have not been added to the F3 menu. The MG34, and the Panzerfaust. Yes, there is both AT and MG, however the majority of inf have zero AT methods, and putting a Panzerfaust in the pointshop is a solution to that. Make it take up the Secondary/Miscellaneous slot in the loadout, and make it rather shite to give AT a purpose. There's no reason for the MG34 to not be in, since the non-MG LMGs, the Bren and the BAR, are there. The only other MG that isn't in the shop is the Lewis, for some reason. A few tweaks to the MG34 and it should be a perfectly fine purchasable Heavy.