Sorry to keep asking dumb rules questions but this one is really nagging me. The Heavy wrist launcher is a cool weapon and I keep trying to come up with character ideas centered around them, so...
Are wrist launchers crossbows? Can I take crossbow mastery with them? Rapid Reload? You wear the on your wrist, so can you have a wrist launcher and hold a weapon in that same hand? If you do can you still attack with that wrist launcher? Can you attack with both in the same round? Since it's on your forearm rather than in your hand does it interfere with your hand or wrist magic item slots? What about shields?
1. For proficiency reasons, yes. Otherwise no.
2. See #1
3. See #1
4. Nothing is obstructing your hand so I wouldn't see why not.
6. Yes, as long as you don't go over the normal amount of attacks you have in a round, otherwise you incur two-weapon fighting penalties.
7. If it doesn't say so in the rules, it doesn't.
8. See #7