In order to turn the armor into an offensive weapon, a bramble merely has to hurl himself against a target, rolling attack and damage normally. When faced with opponents close to its own height (1’ or less), a bramble will attempt to wrestle, causing 1d6 points damage (1d2 dmg in MCA3 version) per round in addition to any damage as a result of the wrestling (see Player’s Handbook, pages 97-98).
Despite their small size, brambles are supremely confident, even when dealing with humans and other “giants." They would think nothing of challenging a “giant” to a wrestling match, especially as they would have no intention of honoring any bets they might place on the fight.
One bramble in ten has another weapon to use in combat; poison. The wing-spines of these brambles secrete a strong poison that causes a painful burning sensation ( -2 on attack and damage rolls for 2d10 rounds, with additional doses having cumulative effects) on anyone hit by them (either as an attack or automatically as a result of picking up the bramble) unless they make a save vs. poison with a -3 penalty, in which case the effects and duration are both halved. As these brambles are perfectly willing to use this poison on dissenting members of their own bands, they are generally the leaders in any bramble group.