This is the next generation Swarm Magnum pellet rifle in .177. Unprecedented speed and power. Unparalleled performance. Offering smoother operation and improved accuracy for an outstanding shooting experience, the Swarm Magnum Pro 10X GEN3i includes the patent-pending 10X GEN3i Technology with our revolutionary new horizontal inertia fed magazine integration, making it lighter, more compact and low profile. The magazine indexes using the inertia force from the recoil of the air rifle – creating a smoother and more precise breech-loading process. This air rifle features a new stock that combines a traditional hunting stock design with the automotive grade glass filled nylon materials. Forearm, grip and cheek piece are non-slip texturized.