Electronic Firing Control System (E.F.C.S.) Circuit Unit For M4

• Enhanced ABS & Precise Magnetic Sensor - Improved Piston Position 
• Withstand Higher Firing Current Up To Around 30A
• Withstand Rapid Semi Firing
• Maintenance Free from Dust or Grease.
• Light & Fast Trigger Response
• Adjustable Trigger stroke Distance 
• Low Power Motor Initiation

EFCS-003 (Mid-Rear Wiring)