Sanctuary, Super Stunner

original movie prop weapon

At the beginning of fourth season episode Fugue, Dr. Magnus and the Sanctuary staff are desperately trying to stop an angry Abnormal, one that easily shrugs off multiple blasts from the standard silver stunners.  Magnus retrieves this beast from the armory and it does the job, taking down the crazed creature (actually Will's girlfriend Abby, as we learn later) without killing her.

Primarily made of machined aluminum and other metal components, with polymer grip, resin stock, and domed acrylic emitter. Depressible trigger. Scope fashioned from a modified Maglite-type flashlight. Illuminating magnetically latched removable energy mag at the base of the grip, as seen in use onscreen; no other electronics.

From Legends Memorabilia.