Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Can someone explain what a mech army is and where I can find the huge pieces people play like this:

It's when you convert a bunch of Gundam and Battletech models into 40k models. They're really sweet when you're done.

Mech stands for mechanised. A mechanised army is one that includes a lot of vehicles, frequently with infantry mounted in transports, with the purpose of being difficult to kill and adding lots of mobility to otherwise slow infantry. Some good example include mech eldar (with Dire Avengers mounted in wave serpents with fireprisms/falcons in support), mech IG (with veterans mounted in chimeras or valkyries with big tanks in support) and mech orks (with lots of ork boys in trukks with lootas in battlewagons in support). Mech armies tend to have the advantage in objective based games, where they can use their mobility to claim objectives with ease, but have a harder time in kill point games because they have a high number of KP.

Large models such as the one you posted come almost exclusively from forge world, a subsiduary of GW that makes very large and detailed resin models that are usually very expensive. http://www.forgeworld.co.uk/

Thanks a lot folks