T26E1-1 Super Pershing converted from a T26E1, called T26E1-1 or T26E4. With a T15E1 gun. Some more converted from T26E3. One shipped to Germany, got field-attached armour from a Panther.
Alligator I-V Prototypes LVT-1 Series model, based on Alligator IV LVT-2 Water Buffalo I (UK Buffalo II), improved powertrain. At Saipan with ramps as LVT-2 doodlebug LVT(A)-1 Armoured LVT-2, M3 Stuart Turret 37mm LVT(A)-2 Water Buffalo armoured LVT-2 LVT-3 Bushmaster Design by Borg Warner with aft rampLVT-4 Water Buffalo II (UK Buffalo IV, many with 20mm+2Mg) Engine moved forward, ramp in the rear Sea Serpent British Variant of LVT-4 with flamethrowers, no use before end of war LVT(A)-3 armoured version of LVT-4, bigger gun, no turret! not produced LVT(A)-4 75mm howitzer M8 turret (some with flamethrower) on base LVT-2 LVT(A)-5 improved (A)-4 afterwar LVT-3C improved LVT-3 with armoured roof and bow Neptune (Amphibian, tracked, 4-ton General Service) British variant of LVT-4 only few produced, Sealion recovery version, Turtle workshop version
M107 Early - with the short barrel M107 Late - with the very long barrel M110 - Short barrel (very similar to M107 Early) M110A1 - Long barrel M110A2 - Long barrel with muzzle brake
SuperAV, ACV On base of 8x8 version of Guarani (by Wikimedia, Author, Rights refer to here). US Name Amphibious Combat Vehicle ACV SuperAV, ACV (TD candidate:Iveco SuperAV Hitfist by Panzerfux, Amphibious Combat Vehicle ACV by Panzerfux)
Pandur II (by Wikimedia, Author, Rights refer to here) Pandur II (TD candidate:Pandur II Variants by STAN Models)
Lance MGM-52 Die Angabe der Nutzerstaaten unterscheidet sich bei wikipedia de und en Lance MGM-52 (TD candidate:M752 Lance missile vehicle und M688 Lance Resupply vehicle by sandsmodels S&S models)