This is a Gamo known as the 10X Mag chambered in 22PEL, model 621259054.
Ten shots" zero reloads" endless possibilities. Introducing the new patent-pending 10X GEN 2 technology with horizontal magazine integration. This magazine enables you to shoot up to 10 pellets without reloading - simply break the barrel and shoot for lightning-quick follow-up shots. This 10-shot magazine is rotor numbered" it has a smooth indexing" and is made of a high impact polymer base.
Features:
Caliber: .22
Type: Multi-shot Magazine
Other Specs: Empty magazine indicator. High impact polymer case. Number of shots left indicator. Rotor numbered. Smooth indexing.
Fits: The magazine designed for the GAMO Swarm Whisper Fusion, and any other model carrying the 10X GEN2.
Ammunition: Any .22 Cal. Pellet.
Capacity: 10 rounds.