If you wanted to make your own and fancied plastic figures a tad taller than the Perry figures, look out for the old Wargames Factory US WW2 set or see if anyone has some spares.
They are nicely sculpted and moulded figures, very crisp detail, have separate arms, ideal for converting and there are standing and kneeling figures perfect for gun crews. Hard to find these days and they are in M1943 jackets so really best suited to late war but they are very attractive figures. You would also get a mass of impedimenta like packs, water bottles, entrenching tools with which to dress the base of the gun, should you so desire.
It was a real pity they were buried in the Warlord purchase of WF's lines as they piss on the WL figures quality-wise from a very great height. Such is progress and er, commerce.......