It's a walker vehicle for my marines, for use in apoc games.
Bigger than a dread, smaller than a titan. Akin to an AT-ST from star wars.
Kitbashed from an airfix robogear kit, some lego and other bit from my bits box.
'Penitent' bomber is just for scale.
Fluffwise, my marine's homeworld is fairly mountainous, with many inaccessible to tracked vehicles - areas. Speeders can reach them, but speeders don't generally have the staying power if trouble presents.
I've given it armour F13 S12 R10, BS4 WS4 S5 I4 A1 (vdr) Fully armoured.
Twin lascannons and two missile launchers.
and it comes out at 183 pts.
Pricey for a standard game, but fine in a 6000pt+ apoc game.