PTW
- Alpha Parts Electronic Control Unit for Systema PTW M4 Series (Systema Program) APARTS-PTW024B$119.99
- Systema Electrical Control Unit (ECU) 4 for 2008 Model or later PTW Out of Stock EL-001-2008$209.99
- Alpha Parts Electronic Control Unit for Systema PTW M4 Series (3rds Burst & Auto) APARTS-PTW024$139.99