Base is a resin one - actually a free 'miscast' sample I got with some others! Painted separately from the model which was then pinned on. Model was origianlly going to face the other way, but it looked better with a claw up on the kerb.
@Pankake - assembly isn't too bad, as there's plenty of metal to enable pinning with 1mm pins, though I had to replace the piston rod on the harpoon arm to get enough metal to drill into. So, overall just patience - which is why it took 2 weeks to build at 1 joint per night!
@blakeh1 - main body is Citadel Tin Bitz drybrushed on - other metallics were Brass (pistons), Boltgun (piston rods, etc.) and P3 Runic Gold for the claws.