ZCI CNC Airsoft gear set 16:1

High Performance CNC gear set 16:1 Specifications: - Drive Ratio: 16:1 - High speed - Material: Steel - Production: CNC Machining - Suitable Spring: M110-M150 - Super High speed: Up to 40 RPS (rounds per minute) with M120 or less spring! - Recommended for Ver. 2 & Ver. 3 Gearboxes only!