Stun

Each time a friendly operative makes a shooting attack with this weapon, in the Roll Attack Dice step of that shooting attack, if you retain any critical hits, subtract 1 from the target's APL.

Each time a friendly operative fights in combat with this weapon, in the Resolve Successful Hits step of that combat:

• The first time you strike with a critical hit, select one of your opponent's normal hits from that combat to be discarded.
• The second time you strike with a critical hit, subtract 1 from the target's APL.