Each time a friendly operative performs a Shoot action and selects this weapon (or, in the case of profiles, this weapon’s profile), after making the shooting attack against the target, make a shooting attack with this weapon (using the same profile) against each other operative Visible to and within X of the original target – each of them is a valid target and cannot be in Cover. X is the distance after the weapon’s Blast, e.g. Blast . An operative cannot make a shooting attack with this weapon by performing an Overwatch action.
Each time a friendly operative makes a shooting attack with this weapon, subtract x from the Defence of the target for that shooting attack. x is the number after the weapon's AP, e.g. AP1. If two different APx special rules would be in effect for a shooting attack, they are not cumulative - the attacker selects which one to use.