Dr. Zoom
First Post
FWIW, the sage answered two questions regarding these issues at the last Sage Advice chat event on the WotC boards. Here is the Q&A:
Q: Can I use a non-trip reach weapon with Knockdown at reach of 10 feet? I have been led to believe that trip attacks are unarmed, which would limit the trip reach to 5 feet.
A: I'm not entirely sure I understand the question. No you can’t use a weapon to make trip attacks unless its description says you can (you're right, trip is an unarmed attack). You can, however, use the Knockdown feat with any weapon at all. It's a misnomer to say that Knockdown lets you make trip attacks; it doesn’t. It lets you knock foes off their feet when you womp them hard enough, and the mechanic for doing that just happens to be the same as the mechanic for tripping, because it works well for this particular situation.
Q: So knockdown doesn't trigger a response trip?
A: Nope. You also don’t get an extra attack from a successful knockdown if you have Improved Trip.
Q: Can I use a non-trip reach weapon with Knockdown at reach of 10 feet? I have been led to believe that trip attacks are unarmed, which would limit the trip reach to 5 feet.
A: I'm not entirely sure I understand the question. No you can’t use a weapon to make trip attacks unless its description says you can (you're right, trip is an unarmed attack). You can, however, use the Knockdown feat with any weapon at all. It's a misnomer to say that Knockdown lets you make trip attacks; it doesn’t. It lets you knock foes off their feet when you womp them hard enough, and the mechanic for doing that just happens to be the same as the mechanic for tripping, because it works well for this particular situation.
Q: So knockdown doesn't trigger a response trip?
A: Nope. You also don’t get an extra attack from a successful knockdown if you have Improved Trip.