2) The Sd Kfz/251 half-track with the 13mm MG131 rear firing gun and three options for forward firing platform. 5cm main gun, 13mm MG131 or rockets can be put in forward firing array.
13mm MG 131? Where?
Last I looked, the 'stock' Mittlerer Schützenpanzerwagen SdKfz 251/1 was armed with an MG34/MG42 with a tiny gunshield (on the B and later models) on a pintle over the driving compartment and an MG34 on a swing pintle over the rear hatch. Six 28cm Wurfrahmen 40 bombardment rockets (either Sprengranate or Flammgranate) could be mounted in wooden frames, three per side. Some vehicles mounted IR gear for the driver and forward machine gunner for duty with the few IR-equipped Panther detachments.
As for variants, the 251/2 mounted an 8.1cm mortar (66 rounds) firing fixed forward (or could be removed and set up normally). The 251/9 mounted the 7.5cm KwK 37 L/24 cannon (52 rounds) in a forward-firing mount with a few degrees of traversal. The 251/10 mounted a 3.7cm PaK cannon (168 rounds) in place of the forward machine gun. The 251/16 carried two pintle-mount 1.4cm Flammenwerfer flamethrowers (700 liters fuel) on the sides. The 251/17 mounted a 2cm FlaK 37 on a pedestal to give it 360° traversal. The 251/21 mounts three MG 151/15 or MG 151/20 aircraft cannon on a flexible mount (outer guns 250 rpg, center gun 400, 2000 rounds in vehicle). The 251/22 has a 7.5cm PaK 40 L/46 cannon (22 rounds) mounted on a girder frame firing forward. The 251/23 has a 2cm KwK 38 cannon (100 rounds) in a turret from the SdKfz 234/1 armored car. Except for the bombardment rocket modification, all of the 251 variants above sacrificed the ability to carry a squad of troops. The other variants in the sequence are uninteresting as far as game play goes -- the /3, /6, and /18 command vehicles, the /4 ammunition carrier/artillery tractor, the /5 and /7 engineer vehicles, the /8 ambulance, the /11 and /19 field telephone support vehicles, the /12, /13, /14, and /15 artillery-support vehicles, the /20 IR spotlight vehicle,
There were also one-off modifications, such as the 251/88, which had the body stripped down to leave just the armor over the engine compartment, placed a flat deck over the rear chassis, and mounted an 8.8cm Kwk 43 L/71 cannon.