The Archwick B&T Air SPR300 PRO 50 Round Magazine is a specific airsoft accessory available for purchase from several online airsoft retailers. This durable polymer magazine is designed for use with the Archwick B&T Air SPR300 PRO sniper rifle and is also compatible with many VSR-10 systems
 
Product Details
Capacity: 50 rounds.
Construction: Made from high-quality, lightweight polymer for durability.
Compatibility: Designed specifically for the Archwick B&T Air SPR300 PRO, it is also compatible with other VSR-10 compatible rifles, including models like the Silverback TAC-41 and Novritsch VSR-10.
Design Features: Features a high-tension spring for consistent feeding and speedloader-friendly, transparent side windows to monitor BB levels.