LokiDR said:
Next, on striking a weapon,
[From the SRD]
Then the attacker and the defender make opposed attack rolls. If the attacker wins, the attacker has made a successful attack against the weapon or shield.
There isn't a static AC. I'm not sure if the archer can use his dex, but it seems so.
First, thanks for the information on stringing a bow. I like AuraSeer's idea of a full round DC 10 craft (bowmaking) check, which draws an AoO. This will coming in handy for wilderness ambushes. I like the idea of a PC hiding behind a tree for cover while trying to get his bow strung.
For trying to smash a bow, I don't think the strike a weapon rules are the right ones to use. You should use the strike an object rules. I don't think making an opposed attack roll with a bow to avoid a successful attack makes sense - unlike an opposed roll with a sword.
So to hit a longbow (size large), you'd need to strike an AC of:
10 (base) -1 (large object) +5 (held in hand) +0 (Dex mod - if any) = 14,
and do about 10 points of damage to break it.
I'd rule the bow string was a tiny object, so that's AC 17.
At low levels this isn't an easy option. In an orc vs. elf situation, the orc's much better off trying to wack the elf, who'll almost certainly have lower hit points than his bow, and probably a lower AC than his bow string.
efreet.