Umarex Synergis Air Rifle .177 Caliber with 3-9x40 ScopeThe Umarex Synergis Pellet Gun is a modern air rifle designed for precision, versatility, and ease of use. It features a . 177 caliber barrel along with a 12 round capacity magazine, enabling rapid firing sequences without frequent reloads. The rifle employs an innovative, patent pending Umarex under lever RapidMag system, which automatically advances the magazine with each cocking action, streamlining the shooting process and increasing efficiency.