Genuine Tokyo Marui slide catch spring engineered for the MP9 platform. This OEM replacement component restores precise slide cycling and reliable hold-open functionality using high-tension hardened steel construction. Built to factory specifications, it ensures consistent performance across field operations, CQB engagements, and extended milsim sessions. The spring maintains authentic cycling behavior and prevents wear-related misfeeds when properly installed. Ideal for maintenance-conscious operators seeking verified TM components. Straightforward replacement with standard disassembly tools. Stock this essential spare to keep your MP9 field-ready and performing at peak reliability.