QUOTE ( Arsenal @ p. 159 - Break Weapon)
Breaking an opponent’s weapon requires skill and, in some cases, brute strength. A character with the Break Weapon maneuver may make a Called Shot (see p. 149, SR4) with a +1 dice pool modifier to attack the opponent’s weapon; treat this as destroying a Barrier (see Destroying Barriers, p.157, SR4). At the gamemaster’s discretion, the remains of a destroyed weapon may still be used as an improvised weapon (see Improvised Melee Weapons,p. 17).
...and...
QUOTE ( SR4A @ p.166 - Destroying Barriers)
If a character is attacking a barrier with intent to destroy it (or create a hole), resolve the attack normally. Since barriers can’t dodge, the attack test is unopposed. The purpose of the attack test is to generate extra hits to add to the Damage Value. If a character got no hits, then only apply the base Damage Value. The only way a character could “miss” is if he got a critical glitch on the attack test. A character may use Demolitions as the attack skill if he has the proper materials and time to set charges.
What I'm taking away from a literal reading of this is that the Break Weapon maneuver can never miss?
I'm kind of amazed at how many of these stupid rules end up this way. So many cases of failing to fully think through the implications of what the wording is actually saying in referencing other rules for newly added systems, all in the name of hitting those magical word count numbers.
I'm even more amazed no one's caught this before. They probably have, but a couple cursory searches didn't turn up anything.
~Umi