177 Air Rifle with Scope 239. 177 caliber 10-shot break barrel air rifle The GAMO Swarm Whisper is ideal for hunting and pest control. . Manufacturer model 611006875554. Published by Christina; Sunday, July 17, 2022. 22 caliber. 3. The Swarm Fusion 10X GEN2 is the second generation of our Swarm technology, featuring a horizontal magazine integration and open sights - making the Swarm Fusion lighter, more compact and lower profile. Scope- Gamo 432 scope.