BattleMech Manual (p. 85)
Designs such as the UrbanMech
, and Lancelot
have a narrow or low profile that makes them harder to hit at range.
If the Margin of Success for a weapon attack made against a narrow/low profile ’Mech is 0 or 1, the hit is considered a glancing blow. For example, if you need to roll a 9 or better to hit the target, a result of 10 would be a glancing blow.
A glancing blow inflicts half the normal damage (rounded down); for weapons that roll on the Cluster Hits Table, instead apply a –4 modifier to the Cluster roll result (with a minimum result of 2). Additionally, apply a –2 modifier when rolling on the Determining Critical Hits Table any time a glancing blow yields the possibility of a critical hit; if using the Advanced Determining Critical Hits rule, apply a –4 modifier instead.
This quirk has no effect versus non-weapon attacks, such as falls or physical attacks. It also has no effect versus all-or-nothing weapon attacks, such as Streak missile launchers.
If using the Linking Weapons rule, the entire linked group is considered a glancing blow.Damage Reduction
: If also using the Glancing Blow rule, the effects stack (1/4 damage is dealt). Any subtractive damage reduction effects (such as ferro-lamellor armor) are applied after all other damage reduction effects.