Jefftron Mosfet - V3 Solo is a professionally engineered electronic trigger unit for airsoft AEGs with V3 gearboxes. It enhances rate of fire and extends battery life compared to standard wiring, while eliminating switch contact sparking and reducing idle power drain. Designed for Tokyo Marui-compatible V3 trigger contacts, this mosfet supports springs up to M160 (75A single shot, 25A burst for max 30 seconds) and batteries up to 17V (NiMH 8.4–12V, LiPo 7.4–14.8V). The unwired version accepts power wires up to 1.5qmm (AWG16) and signal wires up to 0.5qmm (AWG20). Installation requires soldering expertise and gearbox disassembly—professional service centre fitting is recommended if you lack experience. Trigger contacts must be modified per the included English manual. Full gearbox functionality (cut-off lever, selector plate, reverse latch, trigger block) is essential for proper operation. Includes mosfet unit and installation manual. Compatible with standard and common airsoft brands with minimal modification.