Airsoft Sports does a review of the Limited Edition King Arms M4 TWS M-Lok Version 2 which is availble at their store... "The King Arms TWS (Training Weapon System) is part of King Arms' "elite" line of electric airsoft guns. The Limited Edition is part of their top class, these machines are engineered to provide excellent performance and a high degree of reliability.

Features:

• Quick Change Spring Gearbox
• Super lightweight design
• M-LOK interface
• MOSFET key"