Probably a dumb question, but where do you find the wargear options for the kill team members?

When I made Phobos and Pathfinders it wasn't a big deal they all just have the one option basically. But I'm trying to build angels of death right now and every dude has got like 3 guns. The Sgts have like 4 guns and 4 melee options. Where do I find what can go with what. If I'm building a 40k guy normally the data card says something about you can take this really good gun but then only this mediocre melee but I can't find that anywhere in the KT cards. Like can the intercessor gunner have a stalker bolt rifle, with a grenade launcher? Can the intercessor Sgt have a Stalker bolt rifle and a thunder hammer?