User blog comment:Willbachbakal/Co-Op Weapons: Wristgun/@comment-4967439-20120504035528

Hey what about Sonic Flechettes? Once shot, these would embed themselves into enemies and blast them back with enough force to mimic Sonic Boom, in a way. However, this would cause a disturbance which would disrupt your vision and hearing for a moment, but would also effect other enemies. This effect could be negated to you by applying the Deadly Silence upgrade, which causes very little disturbance to you and increases potency against other enemies, and would be able to pierce right through Big Daddies armor and other armored Splicers. However, it only holds 12 rounds and takes a few seconds to be able to shot again.